I think this post from @mtnsun13 is really insightful about how to show interest: Parents of the HS Class of 2023 (Part 1) - #9559 by mtnsun13
But not everybody can make visits, much less multiple visits. How could this technique be used if you’re not visiting these schools? If there’s a synchronous virtual event (i.e. at a specific time…not just available to stream whenever), participate the event and email your admission counselor about the things you liked about the school/program that you learned about in the session. Even if it’s an asynchronous event, if the school just emailed out a link to their new virtual tour, or a panel with some students, or whatever, after you’ve clicked on the link, then email your admissions counselor about what you liked.
Not only is this a great way to show demonstrated interest, it’s a great way to get excited about schools and to learn which ones might be a better fit. That could come up in the “why us” essays if the application hasn’t been submitted, but it’s also helpful once all the acceptances come in and your kid’s trying to figure out where to enroll.