Coordinate crisis communications using Microsoft Teams + Power Platform

I am tasked with re-creating the app using the account that I'd originally tried using and received errors. I know that it is because it is missing some required licensing that it doesn't have. Would someone be able to list the required licensing that is needed. And, if it's not too much, would these requirements hold true for the development of similar PowerApps and Flows if it were not the Crisis Comm template knowing that you have exempted users from some of the license requirement in this particular instance/app. I am getting a lot of push-back from our licensing manager to be able to justify which licenses are needed for an account which will be used to develop and configure Power Platform 'stuff' and I need a clear, concise list; I can't find anything when searching that clearly states in a way that he will be satisfied with.

E1, E3 or E5: Will and E1 have any restrictions of any kind when developing and configuring in any of the Power Platform apps? Which is the minimum requirement?

I presume that the Microsoft Power Apps Plan 2 (Qualified Offer) and the other licenses that are enabled with is required. Is there anything else? Anything in Azure (P1/P2)? Does this license cover the premium connectors that, outside of this instance, has special pricing?

Thank you.