I was trying to run a non-fiber 20ft HDMI 2.1 cable and it can BARELY handle 4K60@8bpc. Anything above flickers in and out constantly. Went and ordered one of these - https://www.amazon.com/RUIPRO-4K120Hz-Dynamic-Compatible-Receiver/dp/B09QHGSCF8?th=1&psc=1

Hope it can handle the bandwidth.