If you need to force a reload your entire page using Vue, all you need is some Javascript:
window.location.reload();
But this is a code smell — you should almost never need to use this method.
Instead, a better solution might be one of these:
onMounted hooks or the top-level of setup. You can also create an initialize action for Pinia.key attribute on a specific component, you can force just one component to reload instead of your entire app. Still a bit of a hack, but it gets the job done.