Hi balaraman,
You can provision the same Robot to different tenants, but with different keys. The Robot will not be available on the two tenants in the same time but it will depend on the key you are using to connect.
So if you provision a Robot on tenant1 with key1 and on tenant2 with key2, then all you have to do is to change the key when connecting the Robot to Orchestrator. This is because a Robot cannot run two processes in the same time so there is no point in having it available on different tenants.
It is not supported to provision a Robot in different tenants with the same key.