Events stemming from a Google Calendar with a link to a Google Meet attached currently do not show this link in any way. It would be nice if this link is displayed somewhere, e.g. in the detailed view, so the meet can be joined from within Kalendar. The plasmoid "Event Calendar" already implements this, as does the GNOME calendar.
Wasn't as complicated as I thought, so I did it myself. Gotta love open source <3 https://invent.kde.org/pim/kalendar/-/merge_requests/267