We are trying to clean up the tabs in a demo org (we've reached the limit of 100).
I've been looking for a Metadata or Schema API, preferably one I can use from Apex, that will let me query for a list of all Lightning tabs in the org and who created each of them.
So far, I've found:
Describing Tabs Using Schema Methods which appears to be limited to tabs that are part of an app (many of our tabs were created from the Lightning App Builder and are not yet part of an app) and
describeAllTabs() which promises to return "information about all the tabs—including Lightning page tabs", but which does not appear to include who created each tab.
I can find this information easily for a single tab in Setup:
But this doesn't scale well when you need to quickly contact all of the folks who've created these tabs and warn them about the oncoming purge.