In the current svelte compiler recipe, we compile a svelte file straight to javascript, then pass the javascript to knip. As a result, knip never sees type imports that happen in svelte files. For example:

// myfile.ts
export type Foo = any
export type Bar = any
export const baz = ''

<script lang='ts'>
  import type { Foo } from './myfile'
  import { type Bar } from './myfile'
  import { baz } from './myfile'
</script>

Here, knip will report both Foo and Bar as "unused type exports" (assuming no other typescript file also imports them).