Preparing for long term storage (2 years)
Your plan sounds pretty sane to me.

Depending on how tolerant your parents are, I would prefer to leave the bike intact and open to the air, so it can dry if it gets damp, but that may not be possible.

I returned from uni, a long time ago now, and dug out my old mountain bike. It hadn't been prepared for 3 years on its own but came out just fine, less a few parts my brother had relieved me of.

When you return you'll want to give them a pretty through service but over 2 years nothing much should have degraded.

Tires would most likely be fine, if they're tubeless the sealant will have dried out and either disappeared or formed a lump of goo. They'll be flat and may crack along the fold.

Some bolts will have some surface rust.