even though they say the below, i mostly heard of it being used in VS Code, in the same way, PyCharm type checker is used in PyCharm.
Q: What is the long-term plan for Pyright?
A: Pyright is now an officially-supported Microsoft type checker for Python. It will continue to be developed and maintained as an open-source project under its original MIT license terms. The Pyright extension for VSCode is a reference implementation and is not guaranteed to be fully functional or maintained long-term.