You can buy the HDMI on Amazon: https://www.amazon.com/dp/B08WCNYCQT
This should work, though without specific detail on which devices you're trying to connect it's hard to say for certain.
You can buy it on Amazon: https://www.amazon.com/dp/B08WCNYCQT
My vision is worse than yours, yet the diopter adjusts works fine for me.
I don’t experience any dizziness.
1200p@120Hz doesn’t result in washed-out colors for me with games on any of my multiple handheld gaming devices which support DP Alt Mode.
iPad Mini 6 connects via USB-C at 60Hz, iPad Pro at 120Hz.
Using Apple’s Digital A/V Adaptor to connect to an HDMI-to-USB adaptor works for iPhones.
This HDMI adaptor is the only one I’ve found which supports 120Hz:
https://www.amazon.com/SIIG-Converter-1080p144Hz-USB-Powered-CB-H21711-S1/dp/B08WCNYCQT
The Redmagic Nubia 2-port USC-C ‘hub’ is the only one I’ve found which supports 120Hz.
You can buy the HDMI cable on Amazon: https://www.amazon.com/dp/B08WCNYCQT
You can buy it on Amazon: https://www.amazon.com/dp/B08WCNYCQT