Could NOT find Python3

[LiuL0ngl0ng]

Could NOT find Python3 (missing: Python3_INCLUDE_DIRS Python3_LIBRARIES
Development Development.Module Development.Embed) (found version "3.9.5")

[LiuL0ngl0ng]

I find my python version is 3.8,but it does work, I used this command and solved it:
sudo apt-get install python3.9-dev