New topics and replies since last login

I would like to show the users all new topics and replies since they have logged in the last time. I use Ultimate member and there is always the time since last login shown to the users in the profile form. Shouldn't be hard to have a query with all topics/replies newer than the last login of the user. I am open to any kind of solution (functions.php hook, shortcode etc).

As a workaround solution I wanted to show the recently updated topics, there is a shortcode for it. But in this case I need to limit it e.g. the last 10 recently updated ones, any ideas on that?

Happy for any support.

best regards

Tobias