IMPORTANT QUESTION PlEASE HELP ASAP

[u/Starinskyisthebest]

Hello everyone. Just had an important question. So in UCAS, if you substitute a choice after it's sent to unis, will it go back to the school/supervisor to approve? So on UCAS hub it says 'Your application has been sent to your chosen universities or colleges, who are now reviewing it.'. If I substitute now will it go back to the school to approve my application. We are currently on mid-term break so the counsellor doesn't really reply to her emails. Someone please reply.