I'm trying to use my BMP boot logo in BIOS. It complains about format. I have Win3 uncompressed BMP, 2-3MB image 1280x720, tried 1366x768. I can read it from my ext3 or from Fat32 flash disk. BIOS always complains about the format. It is correct. Any ideas what I can do?

Backstory: Tia came to us 3 years ago, as a rescue. In the spring she started limping. In the beginning it seemed that it was the usual I stepped wrong and now my paw hurts for a few days. It wasn't getting better, so after a few days we had a physiotherapist look at her and her diagnosis was a raptured cranial cruciate ligament. It means the knee joint doesn't hold together, but freely slides the top over the bottom part. So she went to a surgery, we shelled 5000Eur for it and started rehabilitating. The operation is (very simplified) cutting the bottom knee bone off and screwing it back in flat angle with titanium plate, so two parts don't slide on each other. It didn't seem painful, she was high for the first day on painkillers and from the second day the fentanyl patch she got started working. It is a genetic condition, you can't do anything else with it, other than the operation. She was getting better, but after some weeks started to limp on the second knee. The thing with this is, the second one goes out within a year usually within one year. So we started Gofundme ( link ), as it was a tough year, from Velho partially ripping his Achilles tendon, puppy eating 3 stones afterwards following her mom getting stomach torsion randomly while being in her doghouse, at 2am, Tia having her surgery and now the second one. We're now about 25000Eur in. We saved everyone, so that is awesome. People sometimes think that it is weird we live quite modestly, but this is the reason. We never had so much happening at the same time, usually we have something little bigger every couple years, but not this big and not so much within half year

Help needed: got used HP Chromebook 11 G6 EE I would like to use android apps, but apparently there is no option to enable the Play Store. Any way to get PlayStore, or is this thing too old? It is on ChromeOS 144.