If you haven't given Turbo and Stimulus a shot, I would recommend it. Way faster to write than React, and super fast and performant. I would say its definitely the way to go with Rails pages that aren't extremely simple.
My team inherited a Rails app, which used Turbo and Stimulus and we really struggled to create UIs that matched our design team's vision. We eventually had to move to react + MUI just so that we could build a webapp with a modern look and feel.
None of us come from a rails background, so I'm sure that a big part of our problem came from us trying to bend Rails to our will rather than embracing it - if you have any advice on articles / books that embody the rails approach, I'd be really grateful if you could share them.