Upgraded to 10.18.0 and no longer getting mobile device app catalog updates? You're likely running into PI-007928.
Below is a script you can run against your Jamf Pro instance to identify apps in your catalog that are out-of-date. Then, at least, you'll know which apps to manually update.
https://github.com/cwmcbrewster/Jamf_API_Scripts/blob/master/JSS_API_check_app_versions.sh
EDIT: Here is a second script that will update the app versions for you. The script waits for user input to verify the change but you could easily remove that if you're feeling confident. You'll need an API account that can read and update mobile device applications.
https://github.com/cwmcbrewster/Jamf_API_Scripts/blob/master/JSS_API_update_mobileapp_versions.sh
