Quasar will not feature Svelte. See this GitHub thread:

Svelte doesn’t offer anything significant in return. On the contrary, having to write only html templates instead of using render functions is VERY limiting. Even if we would want to port Quasar to Svelte, we’d have to drop a lot of features. You might say Svelte renders faster, but Vue 3 comes very close in render speed, even surpassing Svelte in many scenarios. Then my final argument would be the resources needed to do this. We are already maintaining the most feature-rich UI library with top-notch support for a LOT of environments (desktop browsers, mobile browsers — android, iOS, cordova, capacitor, …), a CLI with lots of build modes, starter kits, documentation app, App Extensions. There’s not enough companies donating that would allow us to start yet another big big project like a port to Svelte. Our current focus is to add even more components and directives and port Quasar to Vue 3 rather than expanding to Svelte.

Unfortunate, but understandable. I love how simple Svelte is, but Quasar still remains my favorite framework for building things quickly. See You should Use Quasar Framework.