Why can't pip see the open3d package?

Question

Python

The project needed to install the open3d library for python 3.9. But pip scolds that it does not know such a library, even though PyPi.org has it. Tell me what could be the problem, other libraries are installed normally.

Answer 1

But pip scolds that it does not know such a library, even though PyPi.org has it.

Because:
And yet, before using the libraries, it is advisable to get acquainted with the off. docks:

Answer 2

try a younger python, because everything is installed on my python 3.6. although yes, it’s strange, because on the github it says that from 3.6 to 3.9