See workspace tasks
Unfortunately, the Google Tasks created from a Google Workspace product such as Google Chat Room / Google Space / Google Docs are not retrievable from the Google Tasks API and then we cannot get them on TasksBoard.
We will support these features as soon as Google makes them available for developers.
You can star this issue on their API issue tracker here https://issuetracker.google.com/issues/166896024 to speed up the process.
Google Tasks with a label that link to a Google Space/Chat/Doc won't be visible on TasksBoard due to current API limitations