Scanning through a few mdoc-based man pages for inspiration reveals funny inconsistencies in how different projects mention CLI flags in the synopsis. On one side there's the lazy pkg-config approach¹, on the other side there's the fully complete wf-recorder² and in between we have file³, which lists all flags but not their --long-form aliases.
¹ https://manned.org/pkg-config.1
² https://manned.org/wf-recorder.1
³ https://manned.org/file.1