Why won’t AirPods Pro 2 connect to my phone?

Before I go into what’s going on, yes these are authentic. Checked all numbers and even found out it still has a limited warranty.

Bought a set of AirPod Pro 2 with USB-C at an auction. Trying to connect them to my phone and my phone doesn’t even see them. Checking the serial number they still have a limited warranty. Yes I can take them to Apple and they can fix/replace them. Just wanted to see if I could do something before or instead of going to apple.

When I plug them in, it gives me the orange light on the front. Then it goes off (yes normal). When I open the case, it changes to green. Light turns off within 60 sec. Could it be because someone may not have disconnected them from their phone?