Correct. The UB820 still has the 4 modes it had initially.
Besides the metadata display (see pic further down from another forum), the latest firmware also added System Gamma Adjustment (pic from value electronics website).
,
General pic that shows tone mapping:
I believe this was added to the UB820 in latest firmware update in March.
In depth review of the UB820's HDR tone mapping capabilities and more by Kris Deering: https://www.soundandvision.com/content/panasonic-dp-ub820-ultra-hd-blu-ray-player-review