What happens when you watch a standard 16:9 UHD (3840x2160) or HD (1920x1080) video? Doesn't it automatically scale the clip for you to fill the screen?
If not, you can create a custom profile in PD's Profile.ini file with any resolution you want, but the main problem is that you're looking for a nonstandard aspect ratio.
PD19/365 only supports 1:1, 16:9, 9:16 and 4:3 ARs, but the phone screen's AR is about 11:5 so you'd have to use one of the workflows mentioned in any of the hundreds of related posts to create a custom profile using Notepad and then use a free third party utility to trim off the unwanted black edges.
Here's a good
discussion to start with.