Assuming something like "a REST endpoint which takes a few request parameters, makes a DB query, and returns the response" fits what you're describing, you can absolutely copy/paste a similar endpoint, change the parameters and the database query, and rename a couple variables—all of which takes a matter of moments.
Naturally code that is being copy-pasted wholesale with few changes is ripe to be abstracted away, but patterns are still going to show up no matter what.
