Migrate SharePoint Custom Form from tenant to tenant

Hi everyone,

What is the correct way to migrate SharePoint Custom Form using Power Apps from tenant to tenant. I did try some article that tell me unzip the export package and change id of corresponding SharePoint Site Id and List Id. However, this works for only simple form. Regard to complex forms which contain several lists inside, it does not work any more.

Also, is there any third party tools to support this task?