There’ no reason for this, and we cannot reproduce. Did you try to clear the Updater’s storage ? And disable/enable “Allow network access” in App infos/Mobile data usage ?
I’m also using a pixel 3 with ver 5.2-20240701 but no info that an update is available in the updater - I used to run ver 4.x but after an OTA update to 5.x failed I reflashed my pixel 3 manually with ver 4.9 and then sucessfully updated OTA to 5.2. Any advice what I can do?