How to export catalog with treatment profile?

I am working on images for a client and they sent me a lightroom catalog along with a folder of RAW images. I notice in lightroom, in the develop panel, it says treatment profile and says profile missing. When I open a raw image with the sidecar file it also says in camera raw that the profile is not installed. Is this a problem with how they are exporting the catalog? Or something on my end? I have always used presets and not profiles so I am not sure how this can be avoided in the future? How can they export/send lightroom catalogs with the treatment profile they used?