@RedDuelist@JakeSucky As no one has answered and I would like to find it myself I looked it up. Google says “You can find Alex Hay’s tribute note just after you enter the Eye by following the passage on the right all the way to the blocked airlock. You will find the note on the bench there.”
A Redditor posted that he wouldn't be able to play Starfield after being diagnosed with lung cancer as he likely would not survive long enough for the games release
Bethesda honored him in game with this