Most mods are made for Forge, including some of my favorite mods, and some of these favorites are forge exclusive.
Please consider doing a forge version

i would also like a forge

Try it with Sinytra Connector https://modrinth.com/mod/connector first

ok does not work

Was literally coming here to request the same thing after trying Connector.

Forge version is planned, but most probably it will only come in a very distant future, as it requires a lot of recoding.
That being said, someone reported Sinytra actually half-working very recently probably due to its own updates, so maybe full compatibility will eventually come through this way?

Cassian made a NeoForge version for 1.21! (they're cool)
i think this fulfills the idea! for 1.21 and up there's really no use in non-neo forge, everything forge is moving to neo