Hi @ishisone daima
Welcome to Microsoft Q&A Forum, thank you for posting your query here!
Yes, you can change the Virtual Network (VNet) and Subnet for Test migration and Migration after the configuration of Replication in Azure Migrate.
After replication is complete, you'll have the option to select the VNet during the test failover. Similarly, during the final cutover, you can navigate to the networking section to modify the VNet/subnet as needed.
Feel free to reach out if you have any further questions or need additional information—I’m happy to assist!
Please provide your valuable comments
Please do not forget to "Accept the answer” and “upvote it” wherever the information provided helps you, this can be beneficial to other community members.it would be greatly appreciated and helpful to others.