Airbnb expectations

[SparklyThrow]

I have only used Airbnb a couple of times and have had a substantial breakfast provided. Current stay and there is bread and margarine, tea, coffee and milk.

AIBU to expect a proper breakfast?

No I'd definitely not expect that. I've always used it to book self-catering holiday let type places.
Each listing will have a description though so you'll be able to see in advance.