ISOs in Ventoy partition not visible

[garta34]

The FAT16 partition is 31 GB but FAT16 only allows you to store files 2 GB and below, thus only smaller ISOs. When the Ventoy stick was formatted FAT32 - same size partition - none of the computers I tried it on could see any files on the Ventoy partition, regardless of their size. When I mounted the Ventoy stick on an already running computer the ISOs on the FAT32 partition showed up but that is not the use case I need it for. I need to boot from the Ventoy stick.

My guess is that computer BIOSes do not automatically recognize FAT32, is that correct?