13.5.1 update and external monitor doesnt work

After updating to 13.5.1, my external monitor, via HDMI to USB-C docking station, no longer works via my non-Apple dongle/docking station. It is not detected when I plug it in.

EDIT: 2019 MacBook Pro, 16". Ignore the metadata attached to this post since that's for an old laptop apparently.

I have tried:

• Restarting
• Unplugging / replugging everything
• Putting the computer to sleep then waking it
• Resetting SMC and NVRAM
• Rebooting into safe mode
• Using Detect Displays in System Settings
• Changing the resolutions to many other options, none of which work
• Deleting ~/Library/Preferences/ByHost/com.apple.windowserver...
• Different cables
• Different monitors (admittedly both kind of old but both worked before) (only connecting one at a time, not trying multi-monitor)
• Different USB docking stations
• I have also tried a different computer, also with 13.5.1, and reproduced the problem.

None of this makes it work.

IT DOES WORK with a Mac branded HDMI->USB C dongle, but it used to work pre-update with my docking station.

Seems very correlated with the upgrade. Pretty sure this is a bug.

Any other ideas? Anyone have luck reporting things to Apple?