how to get the method parameters type stubs?
PyCharm does generate the docstring stub with the type placeholders, but the placeholders aren't currently (using PyCharm 2022.1) populated from the __annotations__ with the types. This has been marked with the state "To be discussed" in the JetBrains bugtracker, see issues PY-23400 and PY-54930.
Inclusion of the type placeholders is configured by checking File > Settings > Editor > General > Smart Keys > Python > Insert type placeholders in the documentation comment stub.
It's worth noting the insert docstring stub intention is selected on the function name itself

In this example with Napoleon style docstring format selected in File > Settings > Tools > Python Integrated Tools > Docstrings, the result:
