If apps uses components or extensions that store files in external storage, there will be countless problems, bugs & crashes if the targetSdkVersion is manually set to 30. Because with targetSdkVersion = 30 (Android 11) and scoped storage it is no longer possible to save in the external storage (except in certain shared folders such as /Download, /Documents, /Music and the ASD). At least not on Android 10+ devices.
So you should / must wait until Kodular releases the targetSdk=30 update.
See also here: