Welp, a little update here. I took it to a repair shop and they wanted $450 to do the repair. Yeah, no thanks lol. Apparently they can't replace the button without replacing the whole screen and battery (their words). So I ordered a new button and am going to attempt the repair myself. 50% chance I ruin the phone, but hey, only spent $3.99 on the new button.

I'll post the results here (probably a destroyed Note 10+).
Power Button Replacement Part For Samsung Galaxy Note 10+ Plus (SM-N975W) Aura Glow Color Keep Your Device Looking New Replace Your Worn Down Broken And Lost Button This Is Just The Cover Not The Internal Flex Cable 100% Brand New Durable Quality Reasonable Pricing Swift And Reliable Delivery
www.esourceparts.ca