This post is also over at dev.to where I am posting more often now.
I may hate the Notch, but I really love the new MacBook Pro rounded corners. I do it on my Desktop:
...with Displaperture, but I do it on my iPhone SE 2 w/ a Pixelmator Template I created:
I thought I would the template—just replace the middle layer with your desired wallpaper...
Note, this is unique to iPhone SE 2, but it should work on iPhone 6s too.