User impersonation with new external application link

Hi! In the past we have used an application link to connect an external system to Jira Server.
The application link was set up with an “Incoming Authentication” where “Allow user impersonation through 2-Legged OAuth” was turned on.

This allowed us to impersonate any user and that way we could use the application link to create and synchronize worklogs from the external system to Jira.

I can see that the UI for application links has been updated since, and it looks like it is no longer possible to enable user impersonation for an application link to an external system.

Is this correct, or is there are way around this so we can create an application link in the “old” way?