linux ttf font not showing in drop box

I have installed several ttf fonts, but some of them don’t show in the drop down box. They show as installed in Mate Font Viewer and in Font Manager, but I can’t find them in USR/SHARE/FONTS.
Where else would they be stored?
How can I get them to display in LO drop down box?

First, questions: 1) What distro are you using? 2) How did you install them: distro package manager, or something else?

Second, a possible hint. Fonts installed for a single user should end up in ~/.local/share/fonts, or on old systems, ~/.fonts.

What fonts are missing?
Some fonts/font families do not display all the fonts.
This is a known bug in LibreOffice.
I have been testing many font families to see what is working and what is not.
Please list the missing fonts.