Yes, it is possible to use a 34" ultrawide monitor and a 32" monitor together with the AOC AM420B monitor mount, but there are some conditions that must be met:

- VESA mounting compatibility: both the 34" ultrawide monitor (e.g. AOC CU34G2XP/BK) and the 32" monitor (e.g. AOC CQ32G2SE/BK) must support VESA mounting sizes of 100 x 100 mm or 75 x 75 mm, which applies in this case.

- Maximum monitor size: The AM420B mount supports monitors ranging in size from 17" to 34", which covers both monitors.

- Maximum weight: Each monitor may weigh a maximum of 9 kg, which applies to most monitors of this size.

- Arrangement: The mount is designed to hold two monitors side by side, not on top of each other. It is therefore safe to arrange the monitors side-by-side.

It is advisable to check the specific specifications of the monitors and the mount directly with the manufacturers or in the user manuals to confirm compatibility.