This should check the map_invisibility_equipment item tag rather than for carved pumpkins specifically. And the config option could be something like player-tracker.hide.map-invisibility-equipment to make this obvious for anyone searching the Minecraft wiki and etc.

Good points. Since squaremap builds against 1.21.1 this tag does not exist yet. Do you want me to mark this as a draft (or close) and have it be implemented when 1.21.2 is released instead?

Drafting it until then sounds good. Feel free to ping me here or on Discord when it's ready.

1.21.3 is merged to master now

Rebased and changed to use the item tag added in 1.21.2

I've adjusted the check to work more similarly to Vanilla, if mods add baubles/etc. using this tag in the future then someone will need to open an issue and I can look into it then.