You need to provision an Azure App in order to allow WAC to interact with Azure resources. The Azure App in this case will be your bridge between Azure and WAC. You have to configure the gateway only the first time and then your other colleagues will re-use the existing gateway you configured
The registration steps are here: https://learn.microsoft.com/en-us/windows-server/manage/windows-admin-center/azure/azure-integration#register-your-gateway-with-azure
For governance/permissions you have the different roles you can assign here: https://learn.microsoft.com/en-us/windows-server/manage/windows-admin-center/configure/user-access-control#gateway-access-role-definitions