Currently it doesn't seem to be feasible. You can use the activity feed notification APIs in Microsoft Graph for sending notifications.
Requirements for using the activity feed notification APIs:
- The Teams app manifest must have the Azure AD app ID added to the webApplicationInfo section.(Teams app manifest version must be 1.7 or greater)
- Activity types must be declared in the activities section in manifest schema.
- The Teams app must be installed for the recipient, either personally, or in a team or chat they are part of.
For detailed steps ,please follow below doc:
https://learn.microsoft.com/en-us/graph/teams-send-activityfeednotifications#understanding-the-basics-of-activity-feed-notification