I have honestly yet to get any shiny pokemon in Sword and Shield. I spent so long trying to get one from both eggs and the trick you do by beating pokemon, but I still haven't encountered a single shiny pokemon in Sword and Shield. I guess I could say Zeraora, but it was an event pokemon and I just don't count it.
I didn't start shiny hunting till after Shiny Charm and still no luck. I've tried Noctowl, Riolu, Rookidee, and a far many other pokemon. So with so much bad luck, I just stopped shining hunting, But I am thinking about trying to get Shiny Pumpkaboo, at least till the end of October.
Edit: Actually I lied, I completely forgot about the random Shiny Comfey I got when I was looking for Alolan Digglet on Isle of Armor. So yeah, I did get that... as far as I can remember, that is the only one I've gotten and it was by complete accident.
My first one was also a shiny magikarp from that event. I got a bunch of shinies from trading on home. Unfortunately, I have no clue how legit they are. The first real shiny I caught myself was Obstagoon.
Scorbunny bred from one I received in a wonder trade.
I've since bred 2 shiny Rookidee, several shiny Grookies (looking for a female and still haven't gotten it but moved on for now), and 2 shiny Charmanders as well.