In Instant Pot add the 2 tbsp garlic ghee and press saute. Add in the onions and garlic. Saute for 3 minutes.
Next add in the carrots and celery. Continue to have the Instant Pot on saute. Continue to stir with spatula so it does not stick. Add in 1 tsp of thyme, 1/2 tsp of oregano and 1/2 tsp salt. Saute for 4 minutes.
Then add in the chopped chicken breast, mix until throughly combined and saute for another 4 minutes. Add in the remaining seasoning : 1 tsp parsley, 1 tsp thyme, 1 tsp salt, 1/2 tsp oregano, 1/2 tsp pepper, 1/2 tsp garlic powder, 1/4 tsp paprika, 1/4 tsp tumeric and 1/8 tsp cayenne. Mix until combined and make sure nothing is sticking on the bottom of the Instant Pot.
Pour in the 6 cups chicken broth and break the spagheti noodles in half and place on top and press into the broth. Secure Instant Pot lid and lock the pressure release valve. Turn on High Pressure for 10 minutes. Once the 10 minutes are up it will beep and dispaly LO 00. Then let it Naturally relrease for 8 minutes. It will read LO 08. Then quick release, and take lid off when float valve drops.
After the float valve drops and you have taken lid off, gradually pour in the Half and Half, stirring after each pour, then pour in the 3 tbsp lemon juice, stir in. Let sit, stirring occasionally for 2 minutes. Then pour into bowls and serve with crispy bread or large salad!