This building (one that was similar) was posted by Hardcoaler on TrainBoard. I spent a few hours with Fusion and came up with this N scale model of a passenger shelter.

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I printed parts separate and whole above to see what might be best with the Bambu A1 printer. Whole seemed to work even though it was a little bit of a job to remove the supports up inside the shelter.

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I beefed the deck up a little after this print and haven't made another one yet.
You can find the print files for this buildings on my thingiverse account
( HERE ) You can find a couple hundred other items that you can print on my website
( HERE ) Sumner