There are a couple of websites out there that give you future and past locations of "Starlink trains", which is what you probably saw. This site https://findst

There are a couple of websites out there that give you future and past locations of "Starlink trains", which is what you probably saw. This site https://findstarlink.com/ https://findstarlink.com/ does arbitrary locations but not times in the past. As does this one https://james.darpinian.com/satellites/?special=starlink https://james.darpinian.com/satellites/?special=starlink ... presumably if you looked around a bit more than I just did you could find one that does historical viewings.