I agree with the point that the main job of daily standups is to serve the team not PO or managers. Developers should be self organised, yet conduct reports to the managers. Slack standup bots, like https://standupbuddy.app/, are a great way to do so. Reports are posted in one channel accesible by any member so everyone is organised. I think Scrum masters should start to implement digital techologies that are ment to make Scrum more efficient and focus on communication in a team.