Granted I haven’t looked consistently, but when I’ve looked for SFR rentals for myself and others, typically w/d and refrig are not included.

However, they are at times and can be used as an incentive to prospective renters.

If you already have’em, wouldn’t hurt to state they are available if need be in your ad. If you are considering buying them to put them in a rental, I’d probably not bother.