sentinel-s2-l2a-cogscollection is what you want.
sentinel-s2-l2aare catalogs for the original JP2K files in eu-central-1 and are in requester pays buckets. But the COGs are free
The individual zoom rooms don’t seem to work, as it says the host is still running another session (the main lobby one).
So I’m starting a Google Meet for STAC API Talk: https://meet.google.com/xrn-yhwy-pcb