Possible to prioritize online gaming?

Hello. I currently own a eero pro but am still getting high ping and intermit lag. I play on a PS4 hardwired with a Cat6 wire. So I'm planning to get a new setup soon either a router and install openwrt. Or a SBC for routing and my TP link router as a AP. I just had a few question. My eero has SQM but I don't think it's working. So I know OpenWRT has cake, which to my understanding is more advanced. Is there anyway to prioritize online gaming with cake enabled? Also the TP link router I have that plan on might using as a AP is a IQrouter. So would I be able to flash OpenWRT on it?