Hi,
Please check the following article about cluster creation in Windows Admin center, check if you follow the steps to configure the network:
https://4sysops.com/archives/windows-admin-center-cluster-creation-wizard/
(Please note: Information posted in the given link is hosted by a third party. Microsoft does not guarantee the accuracy and effectiveness of information.)
If the reply could be of help, please help to accept it as an answer, thanks for your cooperation!
Thanks for your time!
Best Regards,
Anne