> In an office it's easy for a new hire to ask a question or get someone's attention. When remote, how does the company communicate culturally? Is there an expectation for response times? If not, what internal tools and resources are there that allow a new hire to self-solve common issues?

How is this any different in office vs remote? All of this should be written down in the company manual, at least for a well-functioning org. What is the mistake here? Onboarding folks is literally communicating “this is how we do things around here”