Now while reading this, just keep in mind this is my opinion and if you believe that they are related that is completely fine, it’s just something to think about. In the Henry Stickmin collection, we see the Among Us crewmates as collectibles, and we can punch Henry and Ellie as pets in Among Us. However, in the Henry Stickmin collection, the crewmates in comparison to the stick people are completely different compared to their height in Among Us. Also, in the trailer for the new map we see the outside of the toppat airship. Normally, this would be a dead giveaway they’re connected, however, the logo on the outside of the airship features a purple crewmate, which is clearly not there in the Henry Stickmin games. And it couldn’t take place after the games because we see the airship get destroyed. As far as i believe all the references in these games are just references, no connections, and that’s as far as it goes. However, once again it’s all basically up to you, because as far as i’m aware there’s been no confirmation from the devs, and feel free to correct me if i’m wrong about any of this.
Source: https://www.reddit.com/r/AmongUs/comments/krc4ep/why_i_dont_think_among_us_and_henry_stickmin_are/