Variable font subsets

When we press the subsets button in the dialog box while exporting fonts, will a tutorial on variabe font settings be prepared in the box that appears?
Picture.JPG

I am not sure if these videos on twitter are publicly available, but these two show how it works:

https://twitter.com/i/status/1587469665776930817

https://twitter.com/i/status/1587471989672927232

Thanks.