Hi, @golden alick
Thank you for posting in Microsoft Q&A forum.
When you upgrade the top-level site of a hierarchy, the client installation package on each distribution point in the hierarchy is also updated. When you upgrade a primary site, the client upgrade package that's available from that primary site is updated.
The client upgrade package is a hidden packages, you can find it under Monitoring\Overview\Distribution Status\Content Status\Configuration Manager Client Upgrade Package.
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After the way you tag questions on Q&A is updated, for any "Microsoft Configuration Manager" related problem, you can tag it with "Microsoft Intune", and then "Microsoft Configuration Manager" as the child tag.