Quick follow up question on employee handbooks

https://privatebin.net/?e8d939738eb0f3da#D9PEPU49HNkRetgTCvqhSDhS17JGUUBdywoqURcE3cw4

Quick follow-up question on employee handbooks. How often should a small business update theirs? Ours was written in 2019 and I suspect a lot has changed since then, especially around remote work