[Question] sveltekit dynamic app html at runtime but for Svelte Components

I was reading your great article here: https://adamtuttle.codes/blog/2021/sveltekit-customizing-app-html-at-runtime/
I was looking to inject the results of Svelte Components instead.
I've started a discussion around here and I was wondering if you could help on this : 
https://discord.com/channels/457912077277855764/1089493017678852116/1089493017678852116

Warm regards.