No study leave at my dd’s school or the school where I teach. I think most students benefit from being in school tbh. At GCSE level, revision supported and guided by teachers, with constant feedback and supply of resources, has got to be better than leaving them them to it, IMO.
Also, study leave is great if you have a quiet, safe, non-chaotic space to study at home, with room to organise yourself, if you have all the devices you need at home, if you have present carers to support (and nag), if you won’t be called on to look after younger siblings before/after school, if you have plentiful nutritious food in the fridge, if you don’t need SEN support. But for many young people this is not the case. So getting rid of study leave, especially in some schools, is far more equitable for the young people.
I think (tho am not sure) if carers really feel kids would be better off at home tho, eg if their particular SEN needs mean it would suit them better, the school can’t compel them to come in once exams start.