I just downloaded iOS 18 beta public and was able to customize my apps on one of my profiles. But when I went to one of my other Lockscreen/Homescreen profiles the apps where the same color as the original profile.
Is possible to customize apps in more than 1 profile on ios18 beta public
This is similar to your other question.
The Developer Forums aren't really the right place to raise bugs in a new version of an OS. Apple's engineers aren't reading through these pages waiting to see if anyone's found a bug before they fix it.
These forums are for third-party developers writing apps for Apple's platforms to discuss issues with their code.
You need to raise each issue you find separately at https://www.apple.com/feedback/ You can post the FB numbers here if you want, so that others can link to them.