

Same Apple. Signing new parts to your device is incredibly simple and DIY now.
https://www.ifixit.com/repairability/smartphone-repairability-scores
PROS
- Display and battery repairs are well-prioritized, though not as well as in other (dual-entry) iPhone models.
- Torx screws secure the battery assembly in place, making replacements straightforward.
- Repair parts and instructions are available straight from Apple.
CONS
- Five different screwhead types and the continued reliance on adhesives complicate basic repairs.

I wouldn’t want to be putting second hand parts in my phone when repairing it. I can’t imagine there are many second hand screens or batteries around for sale given they’re the things that are replaced the most.
Not that I’d ever want a second hand screen or battery anyway.