How to see the timeline in targets / how to add emails to the subpanels?

Hello,

I’m running a fresh 8.4 installation.
When I email a lead, I can see the email in the timeline, but not as a subpanel.

When I send the same email to a target, I can’t see that at all.
There is no timeline and no option to show emails in the subpanels.
Seems like from the studio, the relation is there - just not the option to show it.

How to make emails visible for targets?