Personally I try not to over think hdmi cables, even certification and validation is unrelaible and untrustworthy, there has been so many hdmi cables that claimed 2.1 and could not hit the specs. Its so bad one could probably buy a £1 hdmi cable from poundland and it could still hit the 4K, 120hertz specs even.
Not suggesting don't treat yourself or ignore certified hdmi cables but you just want one that works and hits the specs and that might be an £1 hdmi lead to an £10 or £50 lead. A £50 or £99 cable won't magically make your picture quality better.
Some good videos here hdmi cables
here,
here,
here and a great video discussing
fake hdmi 2.1 cables.
As mentioned above someone used the Amazon basics cables and it works fine @ 120/4K. I prefer amazon since if it does not do what it states on the tin, you can send it back as faulty free and get your money back. I think these might be the
ones. Have also heard good things from Kenable certified hdmi cables, but if I was buying it be tempted to try that amazon pack due to specs and pricing and the easy option to return if they don't work.