@Elaine442 No, there's no requirement to provide breakfast in an Airbnb. You just need to be sure to uncheck the "Breakfast" amenitiy. Many hosts, like me, don't offer it because the guests we get aren't the least bit interested in breakfast- they might want a cup of tea or coffee (I do offer that, but I don't mention it in the listing- one of the adages of hosting is to offer less and deliver more), then they like to get out and about. Also I'm a late riser- the last thing I want to do is get up early and make a cooked breakfast 🙂
If you enjoy making breakfast for guests, then by all means do, but definitely up your room rates so it's worth your while. Some hosts just leave a continental breakfast- some buns or croissants, some fruit, yoghurt, milk, granola, etc. But again, make sure you're charging enough to cover that.