That the timelock is per UTXO is news to me but makes perfect sense.

Is there a timer in the wallet next to each UTXO that counts down the time before unlocking the UTXO for the recovery key?

Can you confirm this:

I guess there is also some flexibility, let’s say I don’t do anything for 24 months. All UTXO’s are spendable by the recovery key - but have not moved.

But if I resend them at that point (e.g. 24 months) in time to a new address in my wallet the timelock starts over again. Is that right?