Sharing PowerPoint messes up the fonts

I want to be able to present slides with my video overlaying the slides, so that I'm not stuck in a small window on the side. I found this new powerpoint sharing feature that does what I want, the only problem is it screws up the fonts from my presentation. I'm using Barlow Condensed and Poppins. The slides look fine when I open them in PPT, but when I share on zoom, the fonts don't apply and it causes the spacing to be all off. Is there a way to use specific fonts with this plugin?

Alternatively, is there another way to overlay my video on top of a screen share? I built these slides originally in Canva, so I'm fine presenting from the web browser or a PDF. I just want my video to sit on top of the screen share.