I ran into this exact problem a few months back, trying to find Callie Goulding's stuff in audio format. It's actually a bit of a scavenger hunt, and I'm not entirely sure why. My first instinct was to check Audible, but the search there was surprisingly unhelpful—just a few titles that might be hers, but nothing clearly labeled. I had better luck on Google Play Books; I found a couple of her romance novellas narrated by a voice actor named Emma Wilder. They were decent, but the selection felt incomplete.
Honestly, I think the core issue is that a lot of her work seems to be published through smaller digital-first imprints. Those don't always prioritize audiobook production. I ended up finding a few more by searching her name on Libro.fm, which partners with independent bookstores. That's where I snagged 'The Love Match' audiobook. It's not a one-stop shop, though. You really have to be willing to hop between platforms. I've heard some readers mention finding her titles on Kobo's audiobook service as well, but I haven't tried that myself. The whole process is kind of frustrating for someone who prefers audio, but the stories themselves are cozy and quick.