We support all these formats: ['bmp', 'png', 'jpg', 'jpeg', 'gif', 'svg', 'webp'].
If you can’t see them in the dropdown, maybe double check your files? Make sure they end in .jpg and not .jpg.md. Obviously I can’t see your vault so it’s hard to debug for you, but if you can contrast images that show up on the list and those do not and find a pattern, that would be hugely helpful.
Lastly, just double checking that you need to upload the image file via the usual publish flow in addition to setting it in the logo field. That’s the “upload” part. But since you mentioned the word “upload” I assume you have done that.