Plug it into a computer and see what the computer says.
I usually use Linux for that because it offers good error messages and I know the tools. But other operating systems might help, too.
And if you start writing to the card or executing recovery tools, make a backup / image first.
If the files are very important, maybe don’t tamper with it and ask for help. Like a repair shop, your local Linux community or any trustworthy computer expert friend.
The biggest enemy is probably encryption, if it’s encrypted. The files are definitely still there if you just ripped it out. In the old days you could just run a recovery program and get everything back.
I think they don’t take inspiration from Photoshop. Either it’s been a clone of a different product at some time or they developed it themselves. Hence the differences. I mean the whole UI doen’t really resemble similarity to Photoshop.