I feel it increases my stutter too as the psychological impact of others commenting here too of another restrictive barrier but we still gotta do what we gotta do! It is some pros and cons as I feel if I stutter under my mask, no one can see that I'm extremely struggling and will assume I'm mumbling up due to the mask but at the same time, I would kinda want them to see I'm struggling so they can be a bit more conscious around me?