LR mobile does NOT import .heic files taken on the smartphone - it converts them to JPG
You can import an portrait-mode .heic file with depth information into Lightroom Classic and into LR CC. Depth information is preserved. Since it works for LR CC (Desktop), you would expect that the same would work for LR CC (mobile). IT DOES NOT! You can synchronize .heic photos imported into the LR CC desktop version with LR mobile and then it works, but when you import the same .heic file stored on your smartphone into LR mobile, then it is automatically converted into JPG. This is an error and needs to be fixed. LR CC desktop and mobile are not working consistently here. LR CC mobile must be able to import .heic files from the smartphone and NOT convert them.