The iPhone 12 Pro Max earns a 6 out of 10 on our repairability scale (10 is the easiest to repair):

Screen and battery remain prioritized and reasonably accessible for replacement.

Most components are fairly modular and replaceable.

Some uncommon screws complicate all repairs, but reusable fasteners are preferred over adhesives.

Waterproofing helps reduce the frequency of some repairs while complicating others.

The glass back makes drops even more dangerous and requires a full case replacement if it breaks.