Hi ygeltmeyerhzobfj, welcome to Thunkable! 
Be sure to check out How to ask Great Questions v2.0, the Community Guidelines, and our Getting Started Guide to make the best of your Thunkable Community experience!
As an FYI, based on this article, Android 14 will allow users to dismiss non-dismissable foreground notifications.
Regardless, we do not currently have a feature for setting this up in Thunkable.