Based on previous informations in the media the rough plan for Kämna in 2021 seems to be:
Valencia - Catalonia - part of Ardenne classics - Dauphine - le Tour
Olympics are still on the table, but his main focus will remain on the Tour.
He will ride Catalonia probably for the overall standings as a team leader.
And he mentioned some "nice races" in between.
There are talks about freedom and stage hunting during the Tour.
But between the lines it sounds like that he could also fill out a role as a co-captain for the overall standings.
Bora is very cautious about that. The team manegement repeatedly emphasizes his talent status, which he can develop and they probably do not want to build up pressure of expectations.
Kämna himself often emphasizes that although he was able to show good results in the time trial as a junior, he would have neglected this discipline in recent years.