If it’s remapped it can work on more then just the version it was made for at least that’s my understanding
And remove the lockout

The old version had code to load remapped code
Mayby even allow snapshots?
Like give a warning that it is running on a newer version then it was remapped for

optifine is version-locked, so optifabric remapped code (eg. replacing specific Minecraft class) is also version-locked.
https://github.com/Chocohead/OptiFabric#how-it-works

i belive that could be bypassed with mixins