Panasonic ub820 not streaming 4K from Prime

[Drooch]

When I watch ‘UHD’ content on Prime and I check the streaming data on my TV (LG CX OLED) it’s telling me that it’s HDR but only 1080p.

Anyone know how to stream from the ub820’s Prime app in 4K? Or is my TV lying?

Also, the Prime interface looks pretty low-res, like it’s 1080 at best, but the same interface on the TV looks higher res, probably 4K. Are there limitations to the streaming apps on the ub820?

Thanks.