If you feel comfortable enough you could mention to the group that you stutter before you start the presentation. When people know that I stutter (I’m a covert stutterer) it sometimes helps me stutter less even in some of my most triggering circumstances (planned speaking in front of a group). For me, this eliminates a lot of stress even if it doesn’t stop my stuttering. “Hey so I just quickly want to mention that I stutter sometimes so bare with me”. And then proceed with the presentation. Hopefully you find this helpful. Wishing you well!