Xcode Cloud cannot detect all of local swift package added as submodules

Question

I have created many Swift packages as Git submodules to share among my projects.

I have decided to use Xcode Cloud to build my application instead of Fastlane. However, Xcode Cloud cannot detect the full list of Swift packages added as submodules in my project. As a result, it fails at the clone step.

I have a .gitmodules file in root folder of project.

[submodule "Packages/CommonKitUI"]
    path = Packages/CommonKitUI
    url = git@github.com:myOrgs/CommonKitUI.git
[submodule "Packages/FoundationX"]
    path = Packages/FoundationX
    url = git@github.com:myOrgs/FoundationX.git
...

Could anyone help me?