I will pass on the feedback to the concerned team till then.
I would really like this function as well in Premiere Clip.
The app needs this feature to even be viable for anything relating to pictures. This should really be a priority.
For some reason, Adobe Spark Video does a better job at all picture to video editing than the premiere app.
Pictures should be able to be cropped, and Ken Burns ability, plus more customization.
Adobe can we get a date till fixes.
Agreed that Adobe Clip needs some tender love and care in regards to updates.
In the meantime, I found a little workaround for getting photos to fill the entire screen.
Instead of taking photos with the Adobe Clip app, or importing photos into the app that were taken with your iPhone camera, I use a third party app called Pure (or Pureshot) that can take photos in the 16:9 format. I import these 16:9 photos into Adobe Clip, and voilà, they fill the screen.