Microsoft Edge Workspaces deleted/hidden after update.

[SOLVED]
For anyone still tracking this issue:

The solution was posted by Gian in the following Microsoft Q&A thread:

How to launch Microsoft Edge to a specific Workspace?

After investigating this independently, I can confirm that Gian's findings are correct.

Since Edge 147+, the old workspacesCache approach is no longer valid. To locate Workspace records, open:

edge://sync-internals

Then navigate to:

Sync Node Browser → Edge Workspaces

The Workspace entries can be identified as the records that do not have a parent_guid (top-level Workspace objects).

Credit goes to Gian for publishing the solution first and for providing screenshots in the original thread. I'm posting this here because several related reports, plugins, and discussions still reference the removed workspacesCache mechanism.

Link: https://learn.microsoft.com/en-us/answers/questions/1365453/how-to-launch-microsoft-edge-to-a-specific-workspa