I need a mastodon fork that allows for boost, star, and “raise eyebrow”.

You need a different Fediverse access.
Please have a look at the services #IceShrimp#Sharkey or #Misskwy.
They can do what you want and much more.

All three belong to the same family, the differences between the three are quite small.
My favourite and the line I use here myself is IceShrimp

https://www.youtube.com/watch?v=fQ4Xm92vcq8&t=0