The ISO 45001:2018 standard does not define how you must create your documentation, or how it must look. In terms of procedures you can use whatever format works best for your organization, including flow charts, text documents, or even diagrammatic instructions if that is what works for your employees. As for records, again whatever format make sense to you for a particular record then that is what you can use. This is of course limited by any legal requirements that may exist for records and reports, such as a government form that needs to be submitted.
The general flow for creating documentation should go like this: What information do we need to document? Is there a required format to use (such as legal or other requirement)? If not, what is the best, and simplest, way we can record this information so that it is usable for us?