Am really keen on exposing PowerApps / Flow news - this was provided from Microsoft Flow. You can read out the full post available on this link:

https://powerautomate.microsoft.com/en-us/blog/collaborative-comments-in-power-automate/

Last month at Ignite, we announced a set of collaboration capabilities across Power Platform. Today, we are excited to announce even more features within commenting on Power Automate. Now, you can at-mention your co-workers in your comments  and have others receive email notifications when you do so.