@Keanu Cleenewerck Apologies for the delay in reviewing this post, researched on your query, follow the steps mentioned here. As the Application is not found in the portal, we can add it by using PowerShell commands.
You would need Global administrator permissions to perform these steps.
Connect-AzureAD
New-AzureADServicePrincipal –AppId '703e2651-d3fc-48f5-942c-74274233dba8'
Sign in as the Azure Active Directory Global administrator account when prompted
Let me know if you have any further questions, feel free to post back, if needed we can connect offline and work on this.
Please remember to "Accept Answer" if answer helped, so that others in the community facing similar issues can easily find the solution.