Implementation Steps:
After Creating Dataverse environment, in all the OOB or Custom Entities you will see a Button called FLOW like below screenshot
Lets see how to Hide it.
1. Navigate to https://make.powerapps.com
2. Click Gear Icon at the Top
3. Select Advance settings
4. Now Navigate to Administration then Click System Settings
5. Turn Off
Make sure once you turned on you cannot turn it off
If you want to hide it, you need to hide using Ribbon work bench
For Hiding Button using Ribbon workbench please find my video with Step by Step process