Locate the Azure Bot resource registered to my MsaAppId - cannot create a new bot because the App ID is already in use

I am trying to create/manage an Azure Bot resource but receive:

"Failed to store new bot. MsaAppId is already in use."

The Bot Service resource that owns this MsaAppId was created some time ago and I can no longer locate it in any subscription I have access to. The bot is still functioning in production, so the resource clearly exists.

How I can regain owner/contributor access to that resource so I can update its display name and messaging endpoint.

I do not want to create a new App ID - I need to manage the existing bot, but i cannot find it or have access to it.

I've logged into my old accounts and it isn't there.