Samsung Galaxy A13's screen is detached but still works. Could the cause be an inflated battery?

My phone is a Samsung Galaxy A13, I have been using it since around 3 years ago. I have never had technical difficulties with it. It has a screen protector and cover too, neither of them damaged, and it hasn't recently fallen off.

Today, I was using it and noticed how the screen (with screen protector and all) "detached" from the phone itself slightly (only the top part), keeping itself attached to the phone from the middle and bottom. I was able to use the screen without problems even when it was detached. I tried to bind to the phone with scotch tape, even if it is a bit rudamentary, to keep it from getting wet (I don't have many repairing materials available to me right now).

I can't see a technician right now or tomorrow, but I am worried that the cause of the "detachment" could have been an inflated battery. The cover didn't show resistance when I put it back, nor was the phone temperature hot. I tried touching the back to check for any "inflated spot" but I don't notice anything.

Is it probable that it is an inflated battery? If not, what advice could you give me on phone care until I can take it to a tech?

PS: Sorry for any grammar mistakes, English isn't my first language