DIY REPAIR

There is no place to get new parts for iPhones nor iPads, not legitimate new parts at least. The only parts available are used/salvage parts or (often cheaply made) counterfeits. Some places will claim to sell OEM equivalent devices, but there is no way for any consumer to actually verify they are truly equivalent.

For older devices that maybe are not worth outright replacing, or someone needs to keep running (say as a legacy test device) or just because they like to collect old tech, a reliable source for salvaged parts is iFixit.

Not only do they not, but Apple does NOT sell spare parts for iPhone to customers. iPhone is not a DIY serviceable device and if you did, you'd forfeit any rights to Apple Service down the road.

No