Yeah I learned this the hard way. We gotta round it off ourselves. Hope Apple would change this soon!
However, I have found and been using this great Figma template, which is really easy to use since it let's you change the corner radius directly.
Check it out
https://www.figma.com/community/file/857303226040719059
Topic:
App Store Distribution & Marketing
SubTopic:
General
Tags: