Boil water in Dutch oven; add trimmed green beans and ½ teaspoon salt. Cook on medium-low heat for 5 minutes. Drain the beans, set aside.
Cook bacon in Air Fryer for 14 minutes. Cool, and cut into pieces.
Peel and chop garlic.
Melt butter in a large skillet on medium heat, along with olive oil. Add chopped garlic and sauté for about 30 seconds. Add in green beans and bacon pieces. Sauté on medium heat for about 1 minute, stirring to combine.