At one point I could find the list of data sources that they used on their web site but I am not seeing it now. I wonder if this is a fall out of them being acquired by Rivian.
Yes, before, if you wanted to change a charger, they would direct you to Open Charge Map. Now they have their crappy own editor, and the entire database is wrong.
They’ve always had their own mixed data set, some Open Charge Map and lots of other things that they pull directly (like tesla superchargers etc). I’m not aware of them having stopped using OCM data but of course they’re free to do that at any time. It would be worth asking them what has happened on their forum, perhaps they have switched to something else and you need to update that instead.