[Lil bastard]

It doesn't sound good. I'll spare your central nervous system and refrain from listing all the worst case scenarios.

If I had to guess, which is all I can really do on the internet, I'd say that the repairs failed.

The seal may have worked loose (or may have been improperly installed), there is a guideline for replacing the seal - not all engines can have the seal replaced, but must instead be replaced themselves. Did the Dealership rush the repair just to address the PPI and move the unit?

Or, Oil lines leading to the trunk may have cracked or collapsed (since this area too was messed with when the coolant tank was replaced).

Or, the AOS may have failed (best case).

But whatever the cause, you have obviously lost the integrity of the oil system (since it's leaking on the ground).

I would not run the car, but have it towed to a Porsche Dealer or qualified Porsche independent to find out what is going on. Good Luck!