For completion sake. Might still miss something.
OH:
-There's the whole medical supply drop which boost stats as well.
-Not now, but i think balance team tested giving the new commander HT some FRP but then was removed as it was not intended.
-Since you mention self healing, Stormtrooper/JI can do so(?)
SOV: you are missing several ones.
-Doesn't the new commander allow to drop medical crates on top of FRP ?
-Commissar heal.
-FHQ allows reinforcement and healing
USF:
-Paras don't sel heal? They reinforce on radio beacons.
-Doesn't the Halftrack are able to drop medkits ?
OKW:
-Sure there are more self healing squads.
-Opel Blitz
UKF:
-Halftrack
-Commandos self heal
-FHQ (only reinforce)
While I would not have remembered all of this, I consciously did not mention most of them to keep things more clear to the readers.
I also thought about skipping the SOV commander FRP, mentioned it in the end as an FRP is probably one of the most impactful abilities compared to a commander healing drop. Therefore someone would surely have brought it up and if it's just for the sake of nagging my general argument.
Also I only mentioned Volksgrenadiere since these are mainline infantry and you usually have 3-4 of them, so they are basically the main reason why you need healing in the first place. Self healing on them maybe does not make healing obsolete, but less necessary by far. Maybe you could even sustain med crates if you only need them for the support units.
Self-healing on a special unit (like commandos and storm troopers) that you normally don't have more than one of is still nice, but neglectable for the sake of clarity in my opinion.