Now, if you type python on search box, you should see the Python App popped up.
Click on the icon, the Python shell should show the version and other info.
I highlighted the PATH to the executable.
C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.9_3.9.1776.0_x64__qbz5n2kfra8p0\python39.exe. The highlight show the version specific, so you may have different letters.
If you paste the link to File Explore, you will see something like this. The folder WindowsApps is hidden if you browse manually.