Pat the chicken tenders dry. Season both sides with the smoked paprika and cayenne powder, then set aside.
Heat a cast-iron skillet or large frying pan over high heat. Add 3 tablespoons of the butter and let it melt until sizzling.
Add the seasoned chicken tenders in a single layer. Cook undisturbed 1–2 minutes, then flip and cook the other side until lightly browned.
Push the chicken to one side of the skillet. Add the remaining 1 tablespoon butter to the empty side and add the minced garlic; cook briefly until fragrant, about 30 seconds.
Sprinkle the bottled Italian seasoning over the chicken, add salt to taste, and drizzle the lemon juice over everything. Stir the chicken and garlic together and continue cooking until the tenders are slightly charred on both sides and cooked through.
Stir in the chopped parsley, turn off the heat, and transfer the chicken to a plate. Serve immediately with lemon wedges and squeeze lemon over before eating.