Ever since the upgrade to the new app experieice, any new report that we publish is not accessible to the users by default. I have also ensured they are not hidden in the audience group they are in. All our reports are based on AAS models and the users have access to data source and also use other reports based on the same model. However, if we publish a new report, they get an error message saying the do not have permissions for the data source.
The only way I could make it works was to manually go and add users under the manage permissions of each of these reports and add them manually and then update the app again.