Yes Susansas they can do. It is called a 'forced bleed'. Some women prefer to do this because if there is any build up happening, it gets shed during the 3 day break in a scheduled way - and doesn't freak doctors out.
I am peri-menopause but I take continuous utrogestan due to endometriosis history, I take 300mg nightly - which is quite a high dose but as I don't have any side effects from it and as I am experimenting with high estrogen doses at the moment, everyone is fine with it.
I stop it for 3-5 nights once a month to schedule a bleed. (I try to wait for it to be almost stopped before I re-start as I want it to shed properly.)
Stopping for 3 nights once a month is actually the 'old' continuous regime. It used to be what everyone was told to do on continuous. But because it caused a bleed and some women didn't like that and it wasn't considered necessary in post-meno, they changed this to taking it every night. But it's perfectly safe to stop it once a month like this.
I wouldn't reduce your estrogen by the way. You don't really want to change a ton of things at once, which can cause more bleeding and upset and also isn't going to accurately reflect what you're doing long-term. I mean, you need to know what your body is like on that dose of estrogen in terms of lining. So changing it isn't going to give you much information if you need to stay at 2 pumps or higher long term....