Is there a chance that the page is checked out/locked by other users ?

What made you think that revision cleanup has not done successfully ? Have you checked logs ?How to check if the Online Revision Cleanup has completed successfully?  You can check if the Online Revision Cleanup has completed successfully by checking the logs.  For example, "  TarMK GC #{}: compactio...

Is there any "send notification" step/process for the workflow in question ? If so, can't you just remove that step from the workflow ?

have you seen first time sync happening:How to Run AEM with TarMK Cold Standby

If the page is linked to or referenced, then these references will be listed in the Adjust/Republish step. You can indicate which should be adjusted and republished as appropriate.

So do you see a problem or its just a question on how omni search work ?

What version of AEM are you running ? What keyword do you type ? i.e. as asset name ?

Check this post .. it might help you:Thumbnail Renditions For Video not created while Uploading Video in DAM .

overlays and customization are usually done under /apps with the same structure ... see best practices Workflow Best Practices Also check this sample which can help you to understand when creating custom workflow how pieces are structured and what goes where ... Adobe Experience Manager Help | Creat...

Check the following repo that can help you to structure your project:https://github.com/ahmed-musallam/AtACE-AEM-Vue