Environment

Cascadia Code version number: 1909.16
Application (with version) used to display text: Linux Default Terminal
OS platform and version: Ubuntu
Screen resolution: 1366x768 pixels (96 dpi)

Any other software?
Steps to reproduce

cascadia font

Install cascadia font in the environment mentioned above you will see.
Expected behavior
Equal sign should be visible
Actual behavior
Equal sign in not visible at all