Thank for your answer, I am using both LRC and LR they are linked and Synced, I do not understand how/why they cannot upload in HR right away? What should I change?
Let's go over it again.....it you import images into Classic and then sync them to the cloud, only smart previews are uploaded to the cloud. That is by design. If you want originals in the cloud, you must import them first into any one of the Lightroom apps and those originals will be uploaded to the cloud, and from there a copy of them will also be downloaded into the sync-enabled Classic catalog (so don't try to import them again into Classic).
For all the images that you have previously synced to the cloud from Classic, i.e. are only in smart preview form in the cloud, you can force Lightroom to change them to originals by adding them into Lightroom. The system detects that there's already a synced smart preview, so swaps that out for the full-res original. But that only works if the images that you import are already synced as smart previews from Classic, don't try to import images into Lightroom that are already in Classic but haven't yet been synced from Classic to the cloud.....that's a recipe for confusion.
Also bear in mind your cloud storage allowance. Unless you have bought some additional cloud space, the standard Photography Plan only includes 20GB of cloud storage....that'll get eaten up pretty quickly once you start uploading full-res originals.