I recently bought the DB BR 182 and on Main Spessart Bahn (also Schnellfahrstrecke Köln-Aachen) I noticed that there was no timetables for the 182. I've seen in YouTube videos that there are timetables for it and I don't own Rapid Transit but it still should show up timetables right? (and also in scenario planner it doesn't show) the YouTube video
Nope. Locos will not work at all without their home route (hence the text in the store page). I made the mistake back in TSW2020 with the class 52 and West Somerset Railway, so your not the first. Best way forward is either buy rapid transit which has just had a large makeover, and a new timetable or ask the store you got the 182 from for a refund.