As Microsoft transitioned to a newer equation engine (Office 2007 and later) and eventually to the native and LaTeX -style equations, Equation 3.0 was deprecated. In modern versions of Windows (Windows 8, 10, 11), the SymbolMT Normal font is no longer installed by default on many clean installations. However, if you upgrade from an older Windows version, the font may persist as part of the legacy font set.
Troubleshoot where bullets aren't showing up. symbolmt normal font download install
Sometimes the system cache gets stuck. On Windows, this involves the "Font Cache Service." On Mac, you can restart in Safe Mode to clear it. The Story of Symbol Font: A Typography Journey
Delete the .ttf file from ~/.local/share/fonts/ and run fc-cache -fv . Open the folder containing the downloaded font file
symbolmt.ttf and select Install.