@Mia Chloe
Unfortunately, there is not a screen like that, but it would certainly be very useful to be able to see how many sessions are active, which devices or browsers are currently connected, the date and time each session started, when it was last used, and even have a feature to terminate those sessions individually.
Anyway, I do not know why this has not evolved to this day. It is a self-security feature that could be very useful.
But if you have any doubts or are worried that you might have a session open somewhere "unknown", you can force it to end without having to change your password. Just enter the following URL in your browser:
You can obtain the "sesc" code in several places, one of them is the "quote" button on any post... right-click it and copy the URL

Set up your link, bookmark it and click on it whenever you think it is necessary.
Reference:
While browsing through the code, I found a hidden feature. If you visit a link like this:
https://bitcointalk.org/index.php?action=login2;sa=salt;sesc=insertYourSessionCodeHere
Then all other active sessions will be logged out, but not the current one. So it's like clicking "logout" and then logging back in.
(Your session code is the thing after sesc= on many links, such as when you click "quote".)