In PHP 7.4+, properties can have types specified - if a property has a type and no documentation block, it shouldn't trigger the missing documentation errors.
See similar T258925: Do not warn about missing function doc comment when parameter and return types are fully specified by type hints
This was also discussed on wikitech-l with universal support, see https://lists.wikimedia.org/hyperkitty/list/wikitech-l@lists.wikimedia.org/thread/NWXPNHRNLEVXHSWX33H473OAWQP6CDOA/.