I didn't even know people had liked my posts because there were no notif bubble on the Notification tab. I just, by chance, decided to check the Notification page in full and woah! people had liked my posts since the end of July and I didn't even know!
I don't know if others have this problem but it was okay a couple of months ago, so idk what happened :c
It's solved now, idk what happened but it's now solved!