Creating a Fake Company Slack for Realistic Demos

Hey all, we're looking for a way to create "fake company slack" that has historical message history/ behaviour of a real tech/multi-product company. Anyone have any ideas? From synthetic data sources to more turnkey solutions. Context is that we're trying to get a lot of live realistic demos out for what our knowledge agents at Mash do in Slack (e.g., listening + answering questions from an indexed/auto-validated slack tribal knowledge, company docs and such)! And we don't want to just do a video, would rather show the real thing in the environment where most workflows are.