It seems that the Visual Creator in Copilot for M365 has gone missing.

Same.

I did see this today, and maybe it applies:

Users may be intermittently unable to leverage Microsoft Copilot (Microsoft 365) agents through any connection method

Issue ID: CP1029739
Affected services: Microsoft Copilot (Microsoft 365)
Status: Service degradation
Issue type: Incident
Start time: Feb 27, 2025, 11:00 AM EST

User impact
Users may be intermittently unable to leverage Copilot agents through any connection method.

More info
Users may notice that the Copilot agent either fails to load or disappears after initially appearing in Copilot.
 
If accessing Copilot through a web browser, users may refresh the browser to experience relief. If accessing through the Teams client, users may sign out and sign back in.

Scope of impact
This issue may affect any user attempting to leverage Copilot agents.

Preliminary root cause
A recent change introduced a misalignment with the mechanism responsible for allowing the service to parse models between systems, resulting in impact.

Current status
Mar 13, 2025, 1:03 PM EDT
We've started the deployment of our fix to the entire service environment and have confirmed it is 85 percent complete. Users will experience relief as the fix is rolled out. We expect the deployment to be complete for all users by our next scheduled update.
Next update by:
Friday, March 14, 2025 at 3:00 AM EDT

History of updates
Mar 12, 2025, 11:13 PM EDT
We have validated efficacy of our fix within a small portion of our service infrastructure. We are preparing the entirety of our service environment for deployment which we expect to initiate within the next hour. We expect the deployment to complete within the next 36 hours.
Mar 12, 2025, 5:28 PM EDT
Deployment of our fix to the subset of the affected service environment is proceeding as expected. We anticipate the deployment to the subset of infrastructure will be complete by our next scheduled update.
Mar 12, 2025, 3:51 PM EDT
We've started deploying our fix to a subset of the affected service environment, which we'll monitor to confirm resolves impact as expected prior to deploying broadly.
Mar 12, 2025, 3:32 PM EDT
Mar 12, 2025, 2:32 PM EDT
We've identified a misalignment in the server where agents are not able to parse the models. We've developed and completed the initial testing of our code fix and are finalizing its validation before deploying it to the affected service environment.
Mar 12, 2025, 2:08 PM EDT
We're reviewing support case details and recent service updates to determine the source of impact.
Mar 12, 2025, 1:55 PM EDT
We're investigating a potential issue impacting Microsoft Copilot (Microsoft 365) and checking for impact to your organization. We'll provide an update within 30 minutes.