Hello evancfp,
Based on what you've told us, we recommend trying to resolve the issue by following the steps here: If your headphones don't work with your iPhone or iPad - Apple Support
You may find these steps helpful:
Check for debris, damage, or loose connections
1. Check for debris in the headphone port on your iPhone or iPad.
2. Check your headphone cable, connector, remote, and earbuds for damage, like wear or breakage.
3. Look for debris on the meshes in each earbud. To remove debris, gently brush all openings with a small, soft-bristled brush that's clean and dry.
4. Firmly plug your headphones back in. If your iPhone or iPad has a case, you might need to remove the case to get a firm connection.
Have you tried to play your music using a different cable? We ask because some cables will only support charging while others will support charging ad data transfer.
The iPad Mini (5th generation) does have a 3.5mm headphone jack, are you able to play audio using that headphone jack?
Thanks.