Preheat the oven to 425°F and line a large baking sheet with parchment paper.
Heat the olive oil in a skillet over medium heat. Add the riced cauliflower and cook for about 5 minutes, stirring occasionally, until softened and most of the moisture has evaporated. Transfer to a plate and let it cool.
In a large bowl, combine the cooked cauliflower, ground chicken, panko breadcrumbs, Parmesan cheese, garlic powder, onion powder, paprika, and salt. Mix just until everything is evenly combined. Avoid overmixing, because it can make the nuggets dense.
In one shallow bowl, stir together the panko breadcrumbs, Parmesan cheese, and flour. In a second shallow bowl, whisk the eggs.
Scoop 1 tablespoon of the chicken mixture and place it directly into the panko mixture. Gently press and shape it into a nugget while coating all sides with the breadcrumb mixture. Repeat with the remaining chicken mixture.
Once all of the nuggets have been shaped, dip each one into the beaten eggs, allowing any excess to drip off, then return it to the panko mixture and coat once more, pressing gently so the coating sticks on well.
Place the coated nuggets onto a parchment-lined baking sheet, leaving a little space between each one. Generously spray the nuggets with avocado oil or olive oil spray.
Bake at 425°F for 18–20 minutes until crispy, golden, and cooked through.