glad it's sorted. sometimes just takes a extra hard push. I've seen it where if a phone is dropped hard it causes internal obstruction for the tray to pop out.
I eventually managed to open mine to remove the sd card and put in an additional supplier. it only has space for 1 sim and one sd card. it is supposed to have 2 sims and an sd. its an s20 fe but the sim slots should be the same. can this be fixed?