Have you wished Operator Mono had ligatures similar to Fira Code? If so, here is a utility named Operator Mono Ligatures that will generate new OpenType fonts for Operator Mono that includes ligatures.
Just be warned you do need the Operator Mono font first and it does cost around $200:
NOTE: Because Operator Mono is not a free font, you must have the original font files. This utility will merge the ligature definitions into a copy of the original font. The new font family is named Operator Mono Lig so you can install it side-by-side with the original font.
Personally I’ve not been a huge fan of ligatures and my main reason for liking Operator Mono is the italics, but I know many like them and they do look pretty neat in this VS Code screenshot:
If you want to try it visit the Github repo and install the Python utility to create the new font.