I have the same Issue, I'm using ASUS ProArt PA247CV. I've been using it with MacBook Pro 13 inch M1 no problem. I just not able to wake up when I use it with Mac Studio. When I turn on my monitor before startup the Mac Studio, I would never able to see anything on the screen. I have to turn off the monitor and turn it back on again to make it work. it is very frustrating.
when my computer idle for a while and goes to power saving mode, it will not able to wake up the monitor. when I put my computer on sleep, it will not wake up the monitor.
Before, I had hard drives plug to my monitor as a hub, Now I have to use the power button on the monitor so often, I have to disconnect them to prevent damage to the hard drive.