It can be found that the menu of the right-click item is unavailable for QT graying
Solution
1 Open VS to create a QT project
Find the .vcxproj file of this project, open it with Notepad and find <Keyword>QtVS_v301</Keyword>, put the middle
Copy under QtVS_v301
2 Uninstall the project that needs to be converted, edit the .vcxproj file, and replace the copied QtVS_v301
3 Reload the project, right click, and the Qt menu options that were not available before can be seen
It is recommended to use the 2.40 plugin qt-vsaddin-msvc2019-2.4.1-rev.25.vsix
Attached is the download address of each version of the Qt Visual Studio Tools plug-in Index of /development_releases/vsaddin