I don't think console games ever support mods? The only way to do this would be for the modders themselves to get sponsored by / work with Nintendo directly an

I don't think console games ever support mods? The only way to do this would be for the modders themselves to get sponsored by / work with Nintendo directly and probably the original dev team. You could then have some officially released "mods" (probably they would just call them DLC) and I they would very likely charge. Sounds like you want a Steamdeck