ISO 45001:2018 does include many required pieces of information that need to be documented, and this is indicated throughout the standard by the term ‘documented information’. Where you see the term documented information, this means the evidence for the clause needs to be written down. Additionally, there are procedures and records that the company will identify as necessary documentation, with the rule of thumb being “If we don’t document this will there be a nonconformity?” If there will be a nonconformity, then the information should be written down.
We have created a free whitepaper with a listing of the required documented information from ISO 45001, and a list of other commonly used documents and records. This can be found here: Checklist of Mandatory Documentation Required by I SO 45001, https://info.advisera.com/45001academy/free-download/checklist-of-mandatory-documentation-required-by-iso-45001