https://bird.makeup/ should allow you to follow twitter accounts from the fediverse. Obviously interactions don’t make it back to twitter, but could be useful nevertheless. See for example @franceskalbs@bird.makeup. Unfortunately twitter is full of trolls, so many instances block bird.makeup to avid spam from seeping through.

It’s not an alternative to xcancel as it doesn’t allow you to read feeds you don’t follow, but it’s good if you want to keep up to date with what users post.