ASUS made a robust Z490 option with the Maximus XII Hero (Wi-Fi). Even without a backplate, the board feels solid in the hand and all of the cooling components work well and component choice is well appointed.
It may be a little more than some are willing to pay, but it’s a huge upgrade on their Z390 model. Bigger VRM, bigger power delivery, bigger cooling, loads of connectivity, and great audio. It’s not cheap, but you do get what you pay for.