Edit:
Finally managed to find the actual settings bottom - the remote control has 2 settings button (hint: not the gear button in the center). You'll need to click on the hamburger menu button at the numpad below '7'.
Note that accessing the device menu via the gear button/ Google TV device settings DOES NOT have the HDMI mode sub-menu required to turn on Enhanced Mode.
Also, the backlight bleed on the edges is still horrigible - I could not recommend this TV for the price and given how bad their technical support actually is (my email to their technical support has gone unanswered for 7 days now; don't even get an automated response). I had to go through their Lazada sales support chat who apparently goes to their China backend to request and they don't obviously test on the same firmware as our sets.
See below for backlight bleed at the edges (that's not glare at the sides and edges):
Just informational for anyone considering buying the 43" E7H.
I just bought a pair of the 43" E7H (delivered this Tuesday) and it will not do 4K 60Hz with HDR on its HDMI inputs.
In fact, it won't even do 4:4:4 Chroma sub sampling at 4K resolution (obviously without HDR as it isn't working) - the only mode at 4K60 when connected to my computers is 4:2:0.
Even my yesteryear Prism would do RGB or 4:4:4 with HDR and Dolby Vision certification in Windows (I'm quite surprised at this really considering Skyworth is a pretty low hanging fruit manufacturer).
Hisense email support has not answer my inquiry and the Lazada sales support (I bought from Lazada) has been singularly useless - their technical side keeps repeating the request for information even when I've given it all including pictures and video evidence.
Before anyone asks, yes, I've ran through all the different troubleshooting (even before contacting them):
1) Change HDMI cables - tried certififed HDMI 2.1 cables & non-certified HDMI 2.1 cables, HDMI 2.0 cables etc.
2) Tried different HDMI inputs on both the TV units.
3) Tried different computers and graphics cards - GTX 1650/ RTX 3060/ Intel Iris Plus 655 (iGPU on NUC).
4) Verified that these computers and cables will actually run 4K60 HDR - some are my HTPC units and they can do 4K60 w/ HDR on my other TV units (Prism Q55 & Xiaomi P1) so I know it's not the source side or cabling issue.
5) Factory reset of the TV units.
6) Ran the updates (both TV and computer drivers/ windows patches).
At this point I've just issued an ultimatum for them to either rectify the issue or I'll force a platform refund (yay for online shopping; buying offline would have been a convoluted case of going to CASE and/or SCT).
So there you have it. Don't buy the current E7H 43" since they seemed to have some issues on the hardware side (probably swapped to lower end components like SSD manufacturers).