Tutorial for variable font with multiple axes

Is there a step by step guide somewhere in the forum or YouTube demo for variable fonts with multiple axes? I found many things related to making a variable font with one axis. I have no problem doing that, I can do that, no issues. The problem is when I add multiple axes to the same Glyphs file, the interpolation gets messed up and doesn’t export.


The Creating a Variable Font tutorial shows a two-axis setup.