I think Onley heard what he heard, but I'm not convinced that it is any sort of change in the Cubs stance.
Since this came from other teams, I'm not sure how the Cubs are the ones wanting Bryant to hear it. It would require Theo picking a team (s), saying sure we are open to trading Bryant and we really want offers on him and then hoping that team leaks it to a reporter that runs with the story. It all seems convoluted to me. If the Cubs wanted it leaked, somebody would have mentioned it to Kaplan and he would have run with it.
As far as trading Bryant goes I've yet to hear a proposal that makes the Cubs a better team and saves them money. In your World Series window you aren't trading your best player for prospects. If you trade him for another major leaguer, the list of players that improves the Cubs is basically Trout and Betts. I doubt either guy is getting traded. For an equal value everyday player, most are going to be older and more expensive.
The Cubs knew that when they took Bryant he was repped by Boras and the chances where high that he was going to test free agency no matter what. The Cubs will have the option of bidding for him like everybody else and will have a nice TV contract and only Darvish and Heyward under contract. The Cubs will have to make some decisions in 2022 as to what direction they go with Bryant, Rizzo, Baez, Schwarber, Russell and Theo becoming free agents.