How to handle GroupUserAdding event in power automate or powerapps

We are migrating Sharepoint farm solution to SP Online.

In solution we haveĀ GroupUserAdding receiver. In event receiver, i need to validate user first with some condition before adding to group.Ā  I am not able to find any GroupUserAdding regarding trigger in power automate or in powerapps.

Please help any feasibility or workaround to achieve this.