Remote companies can be set up and operate in a variety of different ways. Some of them are more nuanced than others.
Remote OK often means that remote work is tolerated in a company, but the default tends to go towards working from a head office. It is therefore the opposite of Remote-First, a mindset that favours remote work.
Remote OK often take the difficulties of remote worker's under consideration, but schedules – including meetings, discussion and interviews – are often based on the HQ's timezones.
See also: Hybrid Teams.