We were planning to, but the recent gas spike events on Polygon (
https://nitter.cz/PeckShieldAlert/status/1725437206075216316#m) made us reconsider adding it. What is the point of an Ethereum alternative if it's prone to high gas fees like Ethereum? Adding more Ethereum-alike chains for us add nothing but more risks. However, it's still possible to have it added soon or later.
It looks like the fees are back to normal but that aside, it's probably best to support Polygon zkEVM rather than the POS chain at this point, this is where all the team's efforts seem to be going to. But I'm not sure if that's something you would want to do (now), since it's not really supported by CEXes right now.