How do you record Zoom calls?
Direct answer that works for my setup. YMMV.
1. Install Audacity: https://www.audacityteam.org/
2. Open Audacity: Select Windows WASAPI option under the very large pause and play buttons. Note that I had to select a different microphone in the selection box you can see after the microphone icon.
Here's another, more advanced method, using a free virtual mixer: