If you have no preferred pronouns, just say (none) or something
This will help make people feel more comfortable in this comm and has a side effect of showing you support trans people when making comments in other communities. It will also make reactionaries seethe and make it easier for mods to purge them, and make trans people feel safer all over the fediverse.
This is completely enforceable, the only instance I know of that doesn't allow changing your display name is Hexbear and that's cuz we use that field for displaying pronouns lol