Hello @Leonardo Ferreira , your consultant can manage an app registration trough the Entra Admin Center. Use the following link to access it, just replace yourtenant.onmicrosoft.com
with the actual tenant name: https://entra.microsoft.com/yourtenant.onmicrosoft.com/#view/Microsoft_AAD_RegisteredApps/ApplicationsListBlade/quickStartType~/null/sourceType/Microsoft_AAD_IAM
Let us know if you need additional assistance. If the answer was helpful, please accept it and rate it so that others facing a similar issue can easily find a solution.