Rent tax credit confirmation?

Hey lads

I’ve been renting in my current accommodation for a year and claimed my rent tax credit over two weeks ago. When I log in it says it’s confirmed and I got an email confirmation saying it’s been submitted but I haven’t gotten an approval email yet.

Was just wondering do they usually send one or will it be added to my next pay check? I’ve never claimed it before and it’s so confusing lol

If anyone knows please lmk😃