I don't know why, but when you try to make the cartographer sell the same maps as in vanilla, the maps NOT up to the mansion or monument are displayed incorrectly. (for exemple trial_explorer_map)

also the correct map type (color) is not displayed

{
"type": "numismatic-overhaul:sell_map",
"price": 3000,
"structure": "trial_chambers",
"max_uses": 2,
"villager_experience": 15
},

without mod

with mod

if you try to create a map for a swamp hut, then a white marker is also displayed

I am going to double check this as I am in the middle of porting some map-related changes to 1.21, but I believe if it is unchanged from 1.20 it is a hardcoded check vanilla does when creating these maps. We unfortunately replicate the same checks for Numismatic, meaning any custom modded pointers and newer vanilla ones require us to explicitly add them to the trade adapter.