Quit back left

Hello yesterday I left 0,2 bar on the two rear tires because I thought that was ok. I now have 2,3 back before 2,5, but also had 2,0 depending on how I had loaded. Now I drove today and Heaven’s Help it squeaking back there. First I thought it was the shock absorbers because they are slowly due. With us the roads are a Katasprophe, but you would rather waste the money for Afghanistan instead of plug holes. (sorry my pulse goes up there when I see these holes in the streets) Well, at least I’m back through such a pothole and then it squeaked in the back. Like a train on tracks. Until I drove about 50 m into a left turn. Then it was quiet for a long time, partly in right curves it started again. I have read now that it could be the wheel bearing. But I don’t understand why it has to do with the air pressure. I’m going to get back in 2.5 tomorrow but I think the wheel bearing is still over. nge can I still drive with it and or is it something else? I am grateful for every tip.