Apple and other trade-in providers have similar offers, which is why I never use them. I always sell my devices myself. Sure, it can take a lot longer, but you can get quite a bit more than what they offer you in trade-in. You're giving up value with the convenience of handing it to them, them inspecting and fixing/replacing parts, and, most importantly, adding a warranty to the item and offer AppleCare when they sell it as a refurb.
I sold my iPhone 12 Pro for $450. Apple offered up to $330, which I'm sure was for the highest storage option. I also just sold my 2018 iPad Pro for $350. I initially asked for $450, but settled because I needed the money. Apple offered up to $445, which again is probably for the 12.9" and highest storage option. I have my cellular series 5 watch for sale too for $175. Apple is only offering $75 and selling refurbs for $450...