It’s super easy to reduce the shock to 57.5 all it is is a shim you can get them from Fox 60 mill might work just make sure you let all the air out cycle it so I don’t get the frame
I have only experimented with fox shocks I’ve run dpx2 dhx2 coil and float x2 all are 2020 shocks but the float x2 because resivor on 2020 float hits frame 2021 is much shorter resivor