Question about AOC CU34G2XP/BK

Can the screen also be attached to a desktop monitor mount?

Yes, you can use a 100 x 100 mm VESA table mount. However, pay attention to the size and weight (80.83 cm x 52.82 cm x 23.74 cm, 8 kg) to prevent unwanted tilting.

Can I then also attach the screen to a table monitor mount?
Because I don't want any holes in my walls

The VESA mount for the monitor has the standard dimensions of 100 mm x 100 mm with M4 screws. This means you can easily mount the monitor on a wall bracket with this VESA dimension. The screw length is 10 mm. This information is officially confirmed by the manufacturer.