Add the drained chickpeas to a large bowl and mash with a fork (or potato masher) - you can leave as many or as few of the chickpeas intact that you want.
Add the avocado and mash until smooth. Add the remaining ingredients (through the hot sauce) and mix to combine. Taste and adjust the seasonings as needed. Cover and place in the fridge for 30 minutes.
When ready to assemble, add a spoonful of chickpea salad to each lettuce cup and top with pickled onions & everything seasoning.
Video
Notes
If you are sensitive to heat, remove the ribs & seeds of the jalapeño or omit it.
You can make the chickpeas salad up to 4 hours ahead of time. If you need to make it further in advance, leave the avocado out until ready to serve.