I’ve taken to use HackMD.io for slideshows because they have a slight variation of Markdown that I find extremely helpful. I think they call it BRANCHING. They use 3 dashes to indicate a regular slide separator, but if you use 4 dashes, the slide will be presented as underneath the last slide regular slide. This way slides can be arranged to display main topics left to right, and material pertaining to each topic can be navigated up and down below each main topic slide.
It would be great to be able to have that option integrated into Obsidian.
Also, I think this may have been requested previously, but it would be great if the slideshow presentation could show links without the double brackets.