I’m trying to hatch pic related for a future mono type Ghost walkthrough. Have some questions regarding shiny egg hunting.

1. Are the odds of getting a shiny rolled upon obtaining an egg or when hatching it? I have 3 boxes of eggs, if I don’t hatch the shiny, I reset the game and re-hatch the same batch of eggs. Is this how you do it or have I been wasting my time? lol

2. Does having Sparkling Power 3 active as you hatch increase your chances of hatching a shiny even more?