@rr-4098, Thanks for posting in Q&A.
From your description, I know you want to keep apps deployed via Intune up to date.
Based on my experience, LOB and Win32 apps don't automatically update the version, they require you to upload the update package to Intune before they can update the version.
Here are links about how to update LOB apps and Win32 apps.
https://learn.microsoft.com/en-us/mem/intune/apps/lob-apps-windows#update-a-line-of-business-app
https://learn.microsoft.com/en-us/mem/intune/apps/apps-win32-supersedence
If you want the app to automatically update to the latest, it is recommended that you use Microsoft Store app (New) to deploy the app, which does not require you to upload update packages, the application can be updated automatically.
https://learn.microsoft.com/en-us/mem/intune/apps/store-apps-microsoft
Please note that if you cannot find the app in Microsoft Store app(new), it means that the app is not managed by Microsoft, it is suggested that you deploy the app as win32 or LOB.
Hope this can be helpful.
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