Your eyes are better than mine Stan ; but you could very well be right.Except the OP's 1st photo only shows Partition 1 (513 MB) as exfat (not large enough to hold any .iso files). Partition 2 is an "unknown" filesystem.... suggesting (to me) that it was never created properly, or was deleted, or was corrupted.
Welcome back @arochester! It's been quite awhile, and I'm happy to see you on again.
sdc 14.5G v212w ├─sdc1 ventoy 14.4G exfat └─sdc2 VTOYEFI 32M vfat