Knowledge hoarding is the biggest problem in the workplace today. And it’s not always intentional on the employees part.
Building a culture of creating great documentation in the team wiki, Notion Confluence , or Tettra ( knowledge sharing ) starts at the top. If the CEO isn’t contributing and/or engaging with the knowledge the team is creating, the incentive for the leadership team to do the same is lessened. And that trickles down to the mid-level managers and individual co tributes too.
If you want to encourage a more collaborative workspace as a leader within your company, you have to lead by example and communicate that you expect your behavior to be an example.
Lead from the front. Not from behind the curtain.