I wish to build a simple flow for businness i.e when someone turns a column to false then the flow should break inheritance of that item and allow another group to access the item. i.e OOTB Share function
There is another similar idea https://powerusers.microsoft.com/t5/Flow-Ideas/set-item-level-security-in-SharePoint/idi-p/11208.
It is now possible with the help of Plumsail SharePoint (Third-party connector), which is a part of Plumsail Actions product with a fair price.
There is an action, called Change Permissions that gives you the ability to:
Here are a couple of examples of Flows:
Set item level permissions (break role inheritance and assign permissions)
Create site by custom template and grant permissions