Most ebikes have decently water-resistant controller housings. I’d avoid a serious downpour if possible, but it probably wouldn’t be the end of the world if you get caught in one, and light rain is no problem at all.

I can’t speak to your ride, but I have no hesitation riding my ebike in the rain. I’ve got a Shimano mid drive designed for EMTBs, if it can handle muddy MTB trails a little rain isn’t going to hurt it

Fuck it, just ride!