I couldn't figure out why Progress bar wasn't working under Linux.
For some reason Driver.Stiple is not visible when running WSL under Windows Terminal when using "Cascadia Code PL" font.
It is visible when I use WSL in cmd.exe. It is visible when UI Catalog is under Windows in Widnows Terminal.
Some other fonts work (e.g. "Source Code Pro").
Cascadia Code PL

Delugia Nerd Font

Source Code Pro

Consolas

Lucida Console

Very odd.