Microsoft Flow with Comments Option

Implantation Steps:

1. Navigate to https://flow.microsoft.com or based on your organization flow URL needs

2. Open or Create a New Flow

3. Once the Flow Gets Created

4. Click on the Item where you need to add Comments then CLICK Comments(Preview) at the Top

5. Then Click On New and enter the Comments

6. To add a new Comment Again click on the item in the flow then Click new and Add a new Comments

7. To Delete comment / Edit Comment or Resolve Click on the Three Dots at the right side to process it

That's it 

Video For your Reference.