I don't see such limitations no matter what aspect ratio I use. If you're using 16:9 (as implied by the resolutions you listed) I have 8 profiles available for uploading directly to YouTube:
Even if my project is set as 1:1, 9:16 or 360, I always have at least 7 output profiles and I don't know why you're seeing such a limited selection. Can you take a screenshot and save it as a .png or .jpg, then use the Attachments button under the forum's text box to upload it here?
Alos, do you see limited choices if you produce to the Standard 2D output instead of Online?