I found this vegan mayo online:

To create a healthier (green & delicious) version I typed the ingredients (excluding the word “oil”) and asked AI for a recipe. Here it is! Excellent taste & only 1.64g fat/ tablespoon!
Ingredients:
½ ripe avocado
¼ cup filtered water
2 tsp vinegar (apple cider or white vinegar)
½ tsp palm sugar
2 tbsp cooked chickpeas
2 tbsp aquafaba (liquid from canned or cooked chickpeas)
1 tsp mustard (Dijon or yellow)
¼ tsp salt
¼ tsp garlic powder (optional)
¼ tsp onion powder (optional)
Pinch of black pepper or other spices of your choice
Instructions:
Blend: Add avocado, chickpeas, aquafaba, filtered water, vinegar, sugar, mustard, and spices to a blender or food processor.
Purée: Blend until completely smooth and creamy. Scrape down the sides as needed. If it’s too thick, add a little more water (1 tsp at a time).
Taste & Adjust: Adjust salt, vinegar, or sugar to balance tang and sweetness to your liking.
Chill: For best texture and flavor, refrigerate for 30–60 minutes before using.
Storage:
Store in an airtight container in the refrigerator for up to 5–7 days.
APPROX NUTRITION (if this has 10 servings)
Energy23 kcal
1%
Protein0.47 g
1%
Total lipid (fat)1.64 g
3%
Carbohydrate1.9 g
1%
Water18.63 g
1%