Thonny doesn't see opencv-python package on my Jetson Nano

I'm using a Jetson Nano, which has a arm64 architecture. The Python IDE I'm using is Thonny. I wasn't able to install the opencv-python package on Thonny directly because of the architecture of the Jetson Nano so I had to build opencv from source. I followed this guide: https://docs.opencv.org/master/d2/de6/tutorial_py_setup_in_ubuntu.html But now when I do import cv2 as cv on Thonny it says ModuleNotFoundError: No module named 'cv2' so it's like it doesn't see opencv is installed, how can I do so that Thonny sees the opencv package has been installed?