And where is the nozzle heating? Can't you load or unload the nozzle when it's cold...

Pre-heat the nozzle...

Here is a version with heating included:

[gcode_macro LOAD_FILAMENT]
variable_load_distance: 40         # Distance to load filament into the extruder
variable_purge_distance: 50        # Distance to purge filament after loading
variable_nozzle_preheat_temp: 250  # Default preheat temperature for the nozzle
variable_turn_off_extruder: True   # Option to turn off the extruder after loading (True/False)
gcode:
    # Parameters and settings
    {% set load_speed = params.LOAD_SPEED|default(600) %}  # Speed in mm/min for fast filament loading
    {% set purge_speed = params.PURGE_SPEED|default(300) %}  # Speed in mm/min for purging filament
    {% set target_temp = params.TARGET_TEMP|default(nozzle_preheat_temp) %}  # Target temperature for the nozzle
    {% set min_temp = params.MIN_TEMP|default(180) %}  # Minimum safe temperature for extrusion

    # Save current state of the printer
    SAVE_GCODE_STATE NAME=load_state

    # Heat directly to the target temperature if it's above the minimum temperature
    {% if target_temp >= min_temp %}
        M104 S{target_temp} ; Set extruder to target temperature
        M109 S{target_temp} ; Wait for extruder to reach target temperature
    {% else %}
        # Heat to minimum temperature first if target is too low
        M104 S{min_temp} ; Set extruder to safe minimum temperature
        M109 S{min_temp} ; Wait for extruder to reach safe minimum temperature
    {% endif %}

    # Begin filament loading process
    G91 ; Set relative positioning for extrusion
    G92 E0 ; Reset extruder position
    G1 E{load_distance} F{load_speed} ; Load filament at the specified loading speed
    G1 E{purge_distance} F{purge_speed} ; Purge filament at the slower purging speed

    # Optionally turn off the extruder heater after loading
    {% if turn_off_extruder %}
        M104 S0 ; Turn off extruder heater
    {% endif %}

    # Restore previous state of the printer
    G90 ; Restore absolute positioning
    RESTORE_GCODE_STATE NAME=load_state

    # Completion message
    M117 Filament load complete

[gcode_macro UNLOAD_FILAMENT]
variable_unload_distance: 100      # Distance to retract filament from the extruder
variable_nozzle_preheat_temp: 250  # Default preheat temperature for unloading
variable_turn_off_extruder: True   # Option to turn off the extruder after unloading (True/False)
gcode:
    # Parameters and settings
    {% set retract_speed = params.RETRACT_SPEED|default(600) %}  # Speed for retracting filament
    {% set target_temp = params.TARGET_TEMP|default(nozzle_preheat_temp) %}  # Target temperature for the nozzle
    {% set min_temp = params.MIN_TEMP|default(180) %}  # Minimum safe temperature for extrusion

    # Save current state of the printer
    SAVE_GCODE_STATE NAME=unload_state

    # Heat the nozzle to the target temperature if required
    {% if printer.extruder.temperature < target_temp %}
        # Ensure the nozzle is heated to the target temperature or at least the minimum safe temperature
        {% if target_temp >= min_temp %}
            M104 S{target_temp} ; Set extruder to target temperature
            M109 S{target_temp} ; Wait for extruder to reach target temperature
        {% else %}
            M104 S{min_temp} ; Set extruder to safe minimum temperature
            M109 S{min_temp} ; Wait for extruder to reach safe minimum temperature
        {% endif %}
    {% endif %}

    # Begin filament unloading process
    G91 ; Set relative positioning for extrusion
    G92 E0 ; Reset extruder position
    G1 E-{unload_distance} F{retract_speed} ; Retract filament at the specified speed

    # Optionally turn off the extruder heater after unloading
    {% if turn_off_extruder %}
        M104 S0 ; Turn off extruder heater
    {% endif %}

    # Restore previous state of the printer
    G90 ; Restore absolute positioning
    RESTORE_GCODE_STATE NAME=unload_state

    # Completion message
    M117 Filament unload complete

if I use Martin-Schnebbe macro i get :
Section 'gcode_macro` load_filament' is not a valid config section

Once the underlying issue is corrected, use the "RESTART"
command to reload the config and restart the host software.
Printer is halted

What i'm doing wrong

I find the error:
[gcode_macro` LOAD_FILAMENT] have to be:
[gcode_macro LOAD_FILAMENT]

Thanks - I edited my previous post!

I have hated this change ever since it was implemented because I cannot get it to work. I create these macros and when I try using them from the extrude menu, I get a temperature too low error. I put messages in the macros to see if they get called, but never see the message. Is there something I am missing? The macros I have will heat the extruder.

There is an issue with the heating macro as it does not wait for the filament to be extruded before turning off the heater. To fix this we need to insert an M400 before the M104 S0. It is not really necessary for the unload macro, since it quickly pulls the filament off the nozzle, but for the load one it may get the nozzle to be too cold for properly extrude the new filament.

{% if turn_off_extruder %}
        M400
        M104 S0 ; Turn off extruder heater
{% endif %}