In Germany some banks continue offering the old FinTS API, which from the customer point of view is what PSD2 should have been (i.e. not necessarily referring to the technical implementation details of the API, but the fact that it gives more or less full access to everything you can do with your bank account, and that it is directly useable by regular customers, too).

After a quick search I found this list of banks, though no idea on how current or complete that list is: https://subsembly.com/banken.html