Yes. It's not a big deal tbh. I don't notice it at all unless I haven't worn it for a few days and my teeth shift and it hurts a little. Some days I even forget I'm wearing them until I start talking and have a lisp or attempt to bite something. I think I grind my teeth judging by the cracks on certain areas on the retainer and based on my fucked up dreams. But my teeth don't hurt, and I'm guessing it's because I'm really grinding my retainers and not my teeth.

The controversial alternative is "mewing." The guy behind it is likely a quack with what he claims are health benefits. But the procedure is non invasive and virtually harmless. You just keep your mouth close and keep your tongue on the roof of your mouth. This is supposed to "permanently" keep your teeth in place (or at least be a free alternative to retainers). If you're in your teens, it may give you a gigachad jaw and cheeks. Doesn't hurt to try.