Well in theory there shouldn't be any issues regarding joining servers with active mods. I searched around a little and it seems like Morph is stuck in the 1.12.X version of minecraft but all Minehut servers are 1.16.5.
You can only join a server with a lower version if the server has the plugins ViaVersion + ViaBackwards installed.
Besides that most of the features of the mod won't work like changing hitboxes, other players seeing you as a mob nor their abilities.
Also Minehut doesn't support server-side mods currently.