How can I repair the yellow spots on my lawn caused by pet urine?

Here's a great article on this topic from Hometalk: https://www.hometalk.com/diy/grow/fix-burnt-grass-dog-urine-spots-with-this-easy-solution-31084976

You’ll have to change the PH of your dogs urine which is acidic. My dad is a retired Vetrinarian, and he says you can sprinkle some baking soda in her food mix it well, this will neutralize and make it more alkaline. But see you’re own vet, and see what he recommends. Maybe watch where she pees, and then hose it down with a lot of water and sprinkle that area with baking soda. Once the grass is dead, it’s dead. You can dig those spots out and put in plugs of healthy gras from an area that won’t be noticed.

if you can dilute the area/her pee with water each time after she goes it is best, use small hand rake and remove dead grass, loosen soil, add a little clean top soil and it will regrow adding more grass seed will help it fill in quicker;alot of baking soda in soil/grass is not good either,it does neutralize pee but will eventually create other issues also causing grass to die--Baking soda is sodium bicarbonate, a salt. Because it is a salt, it can damage grass to which it is applied.Baking soda's alkaline nature can make it phytotoxic, even when applied in solutions of very low concentration, including 1 percent. Spotty grass....This is just part of having pets,which means not always going to have perfectly green grass. you could put in astro turf in specific area and train her to do her business there only, so you still have nice green space you want. but you'll still need to treat & clean the astro turf area. These type products are available too https://www.planeturine.com/planet-urine-products-catalog/lawnsaver-dog-urine-neutralizer/ or altering the dogs diet. Not sure( inspite of all online reviews) it is healthy to mess with dogs guts/digestive systems the long term effects on kidneys/bladder. I think that it's just part of having pets----spotty lawns,hair on your stuff,them barking and all the other stuff you have to deal with to keep your pet friends around you.