My concern is that the list looks very repetitive so the CTA doesn't
stand out. Is there any advice out there on how to promote conversion
on a list?
This feels really really subjective. The context behind your list - what does it contain, what's your target audience, what does the call-to-action lead to etc. etc. - without such specifics, it is very difficult to suggest the best UX for conversion gain.
For e.g. here's a list of books on Amazon.
Notice there's no call to action (buy button) on the list. Instead important properties about the items (cost /reviews etc.) are eye catching and then anyone interested in a single item on that list will drill down, go through details and will be shown a pronounced CTA on that details page, followed by the flow to convert. Adding a buy button on this list is probably more clutter than value, even though that's what Amazon wants the end users to eventually do, ain't it.
Anyway, this was just a line of thought that I wanted to share. Beyond this, if your list in context needs the CTA button, then do not worry about repetition. It's all about the aesthetics then.
- Ensuring the UI doesn't feel very cluttered; is well spaced
- CTA button ain't unidentifiebly away from the item info
- The UI doesn't feel too boxy due to plenty of dark borders all around
Without knowing the specific nature of your list, one can really comment on just UI, more than UX.