Yep, most phones these days come apart by using a heat gun to loosen up the adhesive, then you slice through the adhesive with a plastic blade, and then some strong suction cups to pull the screen/back off. Which means that you need to reapply the adhesive when you put it back together again.
It's a colossal, time-consuming pain in the ass. Especially if you don't know where the cables are that connect the screen to the board, as you can slice through them and be left with another part to replace.
Apple Formally Endorses Right to Repair Legislation After Spending Millions Fighting It (www.404media.co)