I'm not sure if there is an existing component in the UI Builder that does that, but for sure you could develop a custom component that will render the input whichever way you like.

I know this adds a lot of overhead though, so it might not be the perfect solution. Hopefully there is an easier way.

I wonder if repeaters could be a solution for you:

https://docs.servicenow.com/bundle/sandiego-application-development/page/administer/ui-builder/task/...