Recently I stumbled upon Manage Sessions in the Business Central Admin Center:
In the Admin Center, open an environment:
Then select: Manage sessions:
Now you can see and cancel sessions:
More information is available here:
The Manage Sessions page displays information about active sessions on an environment and lets you cancel selected sessions.
To open the page, select Manage Sessions. Use the Show session details check box to show more or fewer details.
Canceling a session is sometimes the only way to unblock a customer. For example, a long-running report is locking data in a table, preventing warehouse employees from working.
To cancel a session, select it from the list and then select Cancel selected sessions.