Option A - Pages from Data
Perhaps the cleanest approach is to automatically create a page for each entry in the JSON file. Hugo can’t do that yet. See:
Option B - List Everything, Display None/One
Next you could look at creating a monolithic page with all of the entries, each encapsulated by a parent element with a unique id and CSS display property set to none. Then include the unique id in the URL (e.g., https://example.com/results?id=123), and use some JS to toggle the CSS display property of the related element.
Option C - gomplate
See https://discourse.gohugo.io/t/using-gomplate-to-generate-pages-from-data-sources/27160
n.b. I have no experience with this approach.
Option D - External Script
Something like https://discourse.gohugo.io/t/split-a-json-array-into-markdown-files/30919.
n.b. I have no experience with this approach.