Not really in any meaningful sense. There isn’t much of any common “native” functionality in those OSes that I can think of as being particularly useful to web apps. You can always deploy a PWA that will of course run in a browser, and anybody running those OSes likely has a browser lying around.
Capacitor is about providing access from JavaScript to stuff that isn’t ordinarily accessible from JavaScript. Do you have a particular feature in mind that:
can’t be done in an ordinary browser / JavaScript environment;
could be done “natively” in all three of the OSes you mention;
doesn’t constitute a massive security hole for potential users?