I guess it would be fairly easy to implement with the Cited-by widget and some custom OJS theme plugin code: GitHub - CrossRef/citedbyjs: A Cited-by widget that is easy to embed in any HTML page. But as you can see the widget is fairly old and I have no experience on how it works.
@jmacgreg knows what the plans/schedule is for supporting these Crossref services in OJS. And of course you could always ask Crossref if they have some easy ways of implementing the service.