Tablet recommendation, mainly for comics

I’ve been using a Kindle Fire HD 10 (2021) mainly for reading, comics, and as a second monitor for my PC. It worked fine for a while, but I’ve always wished it had a slightly larger screen, around 12–13".

I’m considering the Lenovo P12, but I’m not sure what other options are worth looking at. My budget is around £300 (new or secondhand). I'm looking for recommendations for an Android tablet with a good display over performance, as I don't think I'd use it for much else other than reading and as a second screen. A higher refresh rate would be a bonus. Thanks in advance!