A $clusterTime ahead does not move the clock
What changes in A $clusterTime ahead does not move the clock compared with MongoDB and what your application has to do.
This difference is of the Stronger guarantee kind.
What MongoDB does
A signed $clusterTime ahead of the node's clock moves it forward, up to 365 days.
What TeselaDB does
It does not move it.
What your application has to do
Nothing.