I tried installing a new flip font apk on the phone but it is not showing on the list of fonts to change it to. Is there something I am missing to get this to work? Thanks
Let me clarify:
You installed a font changing .apk, and can't find it in the system settings>display>font type?
If that is the case, it wouldn't show up there because the .apk you installed should be in your app drawer, you would use that app the change your fonts instead of the system menu.
Or you put a font .ttf/.otf in the system/font folder and it doesn't show in the list?
If it is this one, I have a bunch in that folder that don't show up in the list either, it seems it only picks the stock fonts to display.
If you have tried using the font changing .apk to change the font and it isn't working, my guess is because LG lets you choose between multiple fonts it isn't using the default Android system font name (I don't remember the name off the top of my head) but instead using one of the custom font names.
If you want to change it yourself, you could
try to replace the font you currently have the settings set to in the system/font folder with one of your choice (rename the stock font with a .bak at the end and rename the new font the same name as the old font, then make sure it is the same font your settings are set to).
All this is just speculation though, LG may have implemented the custom fonts differently, but I know they are in that system/font folder, so I think it could work. This is assuming you are rooted of course.