There’s loads of standard gauge steam in the UK with regular service, but it seems that these are excluded because
1) flying Scotsman as it’s not regular service with integrated tickets but runs on public railways and stations
2) festiniog has integrated tickets and runs to normal station but is narrow guage
3) north yorks, swanage, bluebell, svr, Dartmouth etc are regular service to real stations but arent integrated. Dartmouth (kingswear) is certainly used for non tourist purposes.
Not sure from the page but I rode one coal powered steam train in Poland for “fun” and i wish i never did. It was an open carriage trip in koszalin and the pollution it did was such that coal particles rained on everyone. It was awful and I don’t get the nostalgia of riding such an obsolete vehicle. I was so outraged about it I told my wife the experience was like trying to experience a big pre industrial city without sewage system and finding it nostalgic.
Funny that you can buy tickets for this train as a part of the countrywide train network system, but they don’t have a right graphic for this kind of train. The website displays an electric unit with no information that this will be a steam engine: https://koleo.pl/connection/c21a973b-4eaa-55bd-80d0-5dd2541a...