Probably `lstModifiedDate` is not exposed by design, to prevent developers from going in this direction. Instead, GraphAPI exposes [Delta Queries][1] which return not only modified entities but also created and deleted.
[Delta Query for users][2] example.
[1]: https://learn.microsoft.com/en-us/graph/delta-query-overview
[2]: https://learn.microsoft.com/en-us/graph/delta-query-users?tabs=http
Probably `lstModifiedDate` is not exposed by design, to prevent developers going in this direction. Instead, GraphAPI exposes [Delta Queries][1] which return not only modified entities but also created and deleted.
[Delta query for users][2] example.
[1]: https://learn.microsoft.com/en-us/graph/delta-query-overview
[2]: https://learn.microsoft.com/en-us/graph/delta-query-users?tabs=http