Can't run lastgen games from ext hdd on series s?

Yes, you can share your idea in the Xbox insiders subreddit, here's the link direct link for the Ideas FAQ:

(1) ideas - xboxinsiders

Hi and thanks for reaching Microsoft Xbox gamer's community. My name is Josef.
I'm an Independent Advisor and a Microsoft Xbox user like you.

Hope you're doing great today despite this JEDIIJAY92

Unfortunately nope. If a game is compatible with smart delivery you're going to receive the best version of the game compatible with your console

This means, for example if you purchase Halo infinite Xbox one version and you insert the disc into a Series X console. As this title has the smart delivery feature, the system is going to install the Xbox Series X/S (enhanced) version

Smart delivery can't be disabled.
In case you want to know more about this, check this article
https://support.xbox.com/en-US/help/games-apps/...

PS: right now the only way to play Xbox series X/S from an external drive is using the Seagate expansion card

Thats what I was afraid of. Do you know if there's any way to submit ideas or feature requests? I saw there was the insider idea hub but I'm pretty sure they only ask for feedback on pre designated topics not a-hey can y'all add this

series s and x games can only run from the internal storage or official (rip off) expansion card. only xbox one and 360 bc games can run off the external hdd.

If it isn't starting then yes we can help

If it's achievement or ingame issue you need to reach out to the developer

We also need to know which games series s/x also

Keep in mind series s or x games can't run on normal hdds it has to be the storage card or internal memory for that