Font Variable

Some of the google fonts are variable but no 100 ... 900, but only 100 ... 700

They are impossible to use, the build is not working. 
When I try to use 100 ... 700, the system doesn't detect a variable font

In addition, how can we handle the Condensed variant ?

For example : 
https://fonts.google.com/share?selection.family=IBM+Plex+Sans:ital,wdth,wght@0,75..100,100..700;1,75..100,100..700 