I think this is a widespread problem, but it's an incredibly annoying one.
I have an Epson XP-322. During lockdown, I've started using 3rd party inks from eBay that have worked out substantially cheaper and quality of print hasn't been compromised at all. Before then, I'd bought cartridges from Tesco, which were cheaper than Epson, but still quite pricey compared to my eBay supplier. I've been printing a LOT - 2 DD's who prefer their weekly Maths and Science booklets in hard copy format, my work and DH's work less occasionally. We're also planning a renovation so have printing out lots of drawing.
The point is, the inks have worked perfectly.
Then, after an update, inks aren't recognised at all. I've googled, and it's a common problem. Which? Magazine wants consumers facing the same situation to contact them (which I have) but the list of consumers is long.
I've Tweeted Epson who DM'd me some advice, which didn't work, but ultimately their bottom line was - we cannot guarantee you printer will work if you don't use our expensive an overpriced own ink.
Stuck! Is anyone able to offer me any advice? It's incredibly frustrating to not have this essential kit working, but I truly cannot afford the ink prices from Epson.