Looking for a Digital Journal (Learning Journal)

I wanted to include a Learning Journal, digital journal, e-journal, or digital diary as a form of collaborative learning tool in one of the vILT training programs we're developing so that participants can record their reflections in Learner Journal during the breakout room activities (Group Problem-Solving). This might be an MS-Teams-compatible App or any other cloud-based service.

Any suggestions or ideas you would like to provide would be much appreciated.

The threads I've been following are helpful, but I should look into other possibilities as well.

Learning Journal In Rise

Adding a learning journal to a course