HelpMac1111 you might find this article helpful in general though not exactly your issue: http://eclecticlight.co/2026/05/17/last-week-on-my-mac-syncing-metadata-in-icloud-drive/
Also another thing to remember is that when you first convert to iCloud Drive, Apple moves a lot of folders around (one of the reasons I don't use it) which could impact the timestamps of the enclosing folders depending on how they implement that. On the flip side, it may be difficult to reproduce your exact workflow from first receiving this Mac with whatever OS it had to switching on iCloud Drive depending on the details of the situation.
Also another thing to remember is that when you first convert to iCloud Drive, Apple moves a lot of folders around (one of the reasons I don't use it) which could impact the timestamps of the enclosing folders depending on how they implement that. On the flip side, it may be difficult to reproduce your exact workflow from first receiving this Mac with whatever OS it had to switching on iCloud Drive depending on the details of the situation.