In addition of the Powell Teams API, you can use the new Powell Teams connector available in the Power Automate store.
Comparing to the Powell Teams API, the Powell Teams connector allow you to build Power Automate flows without code. All API's endpoints are available to use in this connector.
The Powell Teams connector is a Power automate premium connector and require specific Power automate license for the flow designer only. The user that will use the Powell Teams connector should be Microsoft Teams administrator and Powell Teams administrator.
More details: Powell Teams | Microsoft Power Automate