I find bindings/QtDesigner directory, but there are all .sip file.
In the package website on pypi, it says
The
sip-installtool will also install the bindings from the sdist package but will allow you to configure many aspects of the installation.
sip-install need a file named pyproject.toml, but there is only QtDesigner.toml and it fails to run if I just rename it to pyproject.toml.
sip-install: pyproject.toml: the '[tool.sip.metadata]' section is missing
The content of QtDesigner.toml is
# Automatically generated configuration for PyQt6.QtDesigner.
sip-version = "6.0.1"
sip-abi-version = "13.0"
module-tags = ["Qt_6_0_0", "Qt_6_0_0", "Linux", "Qt_6_0_0", "Qt_6_0_0", "Linux", "Qt_6_0_0", "Qt_6_0_0", "Linux", "Qt_6_0_0", "Qt_6_0_0", "Linux"]
module-disabled-features = ["PyQt_WebChannel", "PyQt_OpenGL_ES2", "PyQt_WebChannel", "PyQt_WebChannel", "PyQt_OpenGL_ES2", "PyQt_WebChannel"]