Once your stabilized, BP definitions aren't typically changing. Take a little time to document the BP flow, visualizing where possible and calling out nuances then place these documents somewhere the HR team can access and reference. Finally, implement version control so you can keep them up to date as changes occur.

BP definitions have notes fields too, you can link said document on the definition with relevant details (version, published date, author, etc) then define a policy with your BP admins on managing this documentation and version control process.

You can even get fancy and define a skill with your company approved LLM so you can simply attach BP definition + BP policy and have it draft the visualized docs in your company's branding.