The release of the demo has been announced on AtariGamer.com, the reference site for the Atari Lynx.

Also the demo is now playable online, directly in your browser, check it out:

https://atarigamer.com/lynx/game/Odynexus:%20Journey%20to%20Ithaca/375031707

https://atarigamer.com/lynx/play/OdynexusJourneytoIthacaDemo/375031707?r=0