Apple generally doesn’t sanction component level repairs so unlikely. My guess is they would be willing to provide assemblies, eg LCDs, batteries, logic boards, etc. and instructions to replace with access to services to enable parts after install. The broken parts get sent to apple for recycling for a refund. eg the replacement battery costs $60 from apple and you get $20 back when you send them the dead battery. At least that’s how it works under the current self service program they have.

Repair shops that have the ability to find the short in your iPhone logic board, rebuild traces and replace a destroyed lightning connector, reball a chip, etc will still have to operate without apples/samsungs/etc explicit consent as always. But if you want a chance of saving your data you’ll need one of these shops. But also maybe back up your data before your phone/laptop/pc/console gets wrecked tbf

Component level repair will always be, in my opinion, a pipe dream.

If you do it for electronics, it can quickly become absurd for other industries. So I have the right to buy just the laser crystal for my car’s CD player? Or just one layer of palladium mesh for inside my catalytic converter?

I don’t see it ever happening.