Yes. Just about every lighting pull switch is 2-way. Even Screwfix sell them!
pedant warning. Yes I know DP switches aren’t 2 way, and I expect you cannot buy 2-way pull switches in Poundland. Etc.
https://www.NoLinkingToThis/p/10ax-2-way-pull-cord-switch-white/70874
Well I never, never thought there would be a demand for one! I guess you could have a pull cord over the bog in case it gets dark whilst you're there.
