See I dunno!!!! You're not a dragon to yinglets (from what I've seen), you're just like. a big dragon to hang around.
Kobolds find a dragon to serve and follow their whim where as like. Yinglets are just Around you. Kobolds want to find a dragon to serve (or at least, someone to tell them what to do). they're less self-sufficient.
but yinglets would actively hate being told what to do and want to be running around doing their own weird stuff. You can't direct a yinglet unless they also want whatever you want. So like, they can hang around you but you're not Their dragon, you're just A Cool Dragon to be with. You couldn't organize a bunch of yinglets to start hoarding gold like you could with kobolds.
Granted this is more Vibes I've just seen around, I've only read some of Out Of Placers