Closed Captioning Font Size

As a Zoom presenter who is live-streaming to Youtube is there a way that I can change the font size on my closed captioning? I understand that the end user can increase the font size through accessibility on Zoom yet because the font size coming from us is so small it makes it unreadable on Youtube where it cannot be changed.
I am wondering if I can adjust the size from my end to make it better for my audience. Thank you!