In a confounding anti consumer and anti capitalist move, virtually all posters teams release on social media are not available for purchase.
I’ve always thought it was bizarre and stupid. Races should be treated like a concert. Who wouldn’t want a poster to commemorate? You could even have special edition versions that are more rare than the regular version with holographic foil and ####. I have some Emek and NC Winters concert posters that are quite valuable. Not to mention incredibly cool.
That being said, some are available here. Just not the Haas one.
https://automobilist.com/f1-print-store/?sort=newest