You can have your own individual 404 page that you can customize how you want it.
https://support.wix.com/en/article/customizing-your-404-error-page
Otherwise, just do the example above and leave the page blank and simply add simple code into the page onReady function so that the page is redirected straight to your own home page.
As the page itself is blank, it should not be noticeable to the user and therefore should look like it is going straight back to your home.
Something like this…
import wixLocation from 'wix-location';
$w.onReady( () => {
wixLocation.to("/yourhomepage");
})
If you have a page that no longer exists and is returning a 404 error, or you have changed the URL name of a previously published page, you can create a 301 redirect to your home page or to another page in the site.