With the new online JSON tool "JSON Crack" you can easily store and share your SharePoint List formatting with your colleagues.
Tool:
https://jsoncrack.com/
Github Repo:
Link
Here's an example of a simple "start Workflow" Button in SharePoint. To reuse it just copy the JSON into a SharePoint formatting column and replace (Workflow ID, button label and color).
(of course you do need the "For selected Item" trigger in PowerAutomate ;) )
Example Link