I want to be able to execute the flow by pressing a button in the PowerApps portal.However, there is currently no function for linking the PowerApps portal with Microsoft Power Automate.
If you can do the above, the range of operations will expand, so I would like the function to link the PowerApps portal and Microsoft Power Automate.
You can create a PowerApps triggered flow that uses the HTTP/HTTPS function - this way you can use the same flow for different calls.
It does however carry a licensing implication.
Likewise, you could create a (https://powerapps.microsoft.com/en-us/blog/using-azure-functions-in-powerapps/) and then use the custom connector in PowerApps to execute the function.