Camouflage is situationally dependent. Normal patrol officers, sure, black, blue, grey, something like that. For a tactical team it depends on the environments they’re likely to work in. Toronto and Ottawa both wear grey clothes. The bulk of their work is urban. OPP TRU and RCMP ERT wear olive green. They have a significant amount of work in green space by virtue of the types of environments they police, and their tactical units sometimes need camouflaged clothing for the same reason the army does- if they’re containing and negotiating with someone armed and barricaded with a rifle on a rural property, they want to be hard to see.
I don’t believe Canada has any real problem with normal patrol officers looking ‘militarized’. Some people may take issue with, eg, an external body armour carrier with pouches on it, but that’s just a reality of the amount of stuff we need to carry now.
The best current research on this in Canada is Blaskovits et al. from 2022.