MBP M4 Pro chip cannot drive two external monitors at the same time.

I cannot run two monitors external at the same time. I have tried TB5 cables direct to MBP, TB4 cables direct to MBP, TB5 cables to a TB5 dock, TB4 cables to a TB4 dock. USB-C to DP cables, USB-C to HDMI adapters, nothing works. My monitors are ASUS PG32UCDM, I set both to 100Hz 1440P and only one will display.

I’ve plugged one TB5 port and the other HDMI port. I pull the cables the other displays. They both display on my M1 at 1440P 100hz same time. They don’t even work at 1080P/60hz together, lid is always closed.

the docks are both OWC with genuine TB5 and TB4 cables.

I’ve factory reset the MAC, monitors.

anyone any ideas? MAC support says a know issue but I can’t believe it is as it has not blown up on the internet.

i don’t think this could be a monitor issue as they are both the same and both work correctly on an M1 with the pro chip.