I suffer with this, too.
I'm on about 3 pumps of gel and 2.5mg of Provera (which I'm waiting to see if I can change).
I've always been a sweater (not very ladylike), but menopause sweating is extreme even for me. I've started to smell sweaty, too

I've recently started using Odaban spray on my forehead, armpits, cleavage and underboob area (damned large breasts that have always been a literal and otherwise pain), and it works.
I have MS and the slightest heat and sweating drains me utterly (anyone remember the deflating lady ad for Complan? That's me in the heat even in winter). Just reducing the underboob sweating has a marked difference in my energy and the lack of cleavage sweating (side-sleeper unfortunately) in the night makes a difference to the neck rash I was having. Not having to mop my forehead is a relief, too.
I'm not keen on messing with nature like this but needs must and I don't seem to have sprouted excess sweat pumps anywhere else on my body.
If you decide to use it follow the instructions (though I don't wash it off in the morning) and don't try to apply it every night or you'll get a weird itch. It goes away if you don't apply so often, though.