As you may know, we’ve had Trello available for Microsoft Teams for some time. We are excited to announce that this integration has just been enhanced, with the availability of Trello’s personal app functionality. Trello’s Personal app in Microsoft Teams will gives users access to assigned cards across all their Trello boards for different teams where they are contributing.
https://techcommunity.microsoft.com/t5/Microsoft-Teams-Blog/New-Trello-Personal-app-available-in-Microsoft-Teams/ba-p/288942