With Vue 3 and the composition API, you can do basically the same things you're doing in Svelte. You can also add SolidJS and Preact to this list as well - the magic ingredient in all these frameworks is signals, which allow you to have reactive data without having to have a UI framework to provide lifecycle events.
A good example in Vue is the top example in this page: https://test-utils.vuejs.org/guide/advanced/reusability-comp... The other examples show some other things you can do if you want, although I'd typically recommend against it - keep your signal-related code free of component/lifecycle-related logic, and it will almost always be much easier to test.
(As an aside, I'd add Angular to the list of frameworks that are easy to test, although the framework feels like it goes out of its way to convince you of the opposite. Services are just classes that maintain reactive data - originally via RxJS/Observables, although now signals are also supported - and if you keep them like that, they're fairly easy to test. Unfortunately, Angular's decorators/DI/module system is very pervasive, and at least when I was last using it, meant that even theoretically simple tests still needed lots of boilerplate. But theoretically, it belongs in the same category as the frameworks above.)
