@Conteh, Joseph I. [CTR] Thanks for reaching out! You should definitely be able to invoke a workflow built in Logic Apps from a flow in Power Automate. Could you share details for a more specific use case that you might be exploring this for? That way, we can check and offer specific recommendations. Generally speaking, to connect Power Apps to Logic Apps, you can use the Logic Apps connector in Power Apps. The Logic Apps connector allows you to trigger a Logic App from Power Apps and pass data between the two. You can also use the Logic Apps connector to create a custom connector in Power Apps that can be used to call a Logic App from within a Power App.
Once you have connected Power Apps to Logic Apps, you can use the Power Apps canvas to create a custom UI for your Logic App. You can use the various controls and components in Power Apps to create a user-friendly interface for your Logic App, and then use the Logic Apps connector to trigger the Logic App and pass data between the two.