Telephoto by a mile for me too.
But it probably just depends on what you take pictures of more. Someone who takes more pictures of huge subjects (landscapes, cityscapes, large crowds, etc) or in smaller spaces probably appreciates the UltraWide more. It also has the macro function.
But I take a lot of spontaneous photos and videos of single or a handful of objects (people, animals, cars, etc) in large open spaces. In those situations I often find it impractical to get closer to the subject (fleeting moments, subjects in the sky, performances at a venue, etc).
When I had an iPhone Pro, I didn't use the UltraWide much and when I did it was mostly for the macro function. But the standard iPhone (and rumored folding iPhone purportedly) omits the telephoto so I assume the majority of users prefer having the UltraWide. But still just interested to see what the distribution is for MR users.