npub1y08u7fstzdyvw8xjw36scu9m66ypxrsd34ad999dhzytfhhdky3sesrfe4 (npub1y08…rfe4) there's a British magazine called Model Engineering devoted to people who make small steam engines and other scale model sized working engines.
There's also an Engineering in Miniature magazine which also seems to cover slightly larger engines as well.
https://magazinelib.com/all/model-engineer-30-june-2023/
https://magazinelib.com/all/engineering-in-miniature-june-2023/