Do most lowcost airlines not have this policy? Im sure RYR does.
I think alot of airlines still sell peanuts. And to be honest som many other products contain nuts aswell.
At easy we do sell peanuts onboard, however if a pax makes us aware of their allergy to nuts, we do a PA before service explaining no peanuts will be sold onboard due to a pax onboard having a nut allergy, we also politely ask people who may have brought their own peanuts to refrain from eating them.