Hi @blickmondoo, thanks for your query. It is ultimately up to the game studio developers to implement this feature so I would strongly encourage you and any other users interested in having Tobii eye tracking support with No Man’s Sky to post in their own forum and support centre.
You can find their support request page @ https://hellogames.zendesk.com/hc/en-us/requests/new
The more votes they receive, the more likely this feature will be introduced! Thanks.