I’m glad the advice shared above (
https://helpx.adobe.com/lightroom-cc/kb/heic-files-support.html) seems to be helping.
On the iOS side, if anyone is still getting JPGs when trying to import HEIC, please be sure to update the LR Mobile app for iOS to version 3.3 – this latest version will import the HEIC originals from the device camera roll. Previous releases would convert HEIC to JPG during import, regardless of iOS settings.
Regarding HEVC video, the LR Mobile iOS app can import HEVC videos tha...