DATUM itself probably does, but the Bitcoin Core wrapper for StartOS does not have some configurable settings (like 'blocknotify') that datum needs.
Discussion
🧐🤔 that’s not good
well, it's not really an option that a start9 user would normally use. Only the most common and sensible options are currently exposed by the Bitcoin Core wrapper. Knots had to specifically add it for datum too :)
This can be easily added to the Core wrapper though, but it's currently not on Start9 mind I suppose as they work hard to get the next OS update out.
Yes, on StartOS you need to run Knots for Datum to work.