@Christian Redgewell Thank you for reaching out to us. As I understand you want to delete this configuration (below screenshot), I don't see the option.
On further checking/investigating the audit logs of this activity, noticed this configuration is created as ApplicationManagement category
Navigated to the Enterprise Applications blade within Azure AD, noticed application with similar name is listed, by going to properties blade renamed the application with the desired name
Same information is updated in the cross tenant sync section.
Similar way, you can delete the application from the Enterprise apps section and cross tenant sync configuration will be deleted.
Let me know if you this answers your query, if you have any further questions, feel free to post back.
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