A lot of discussions have focused on DisplayPort 2.0 lately but what is DisplayPort 1.4? It is the previous standard that may be well suited for your needs.
Tripp Lite DisplayPort 1.4 Cable - 8K UHD @ 60 Hz, HDR, HBR3, HDCP 2.2, 4:4:4, BT.2020, M/M, Black, 6 ft. - DisplayPort - P580-006-8K6 - Monitor Cables & Adapters
USB-C to DisplayPort 1.4 adapter cable - 2m - for 8K/60Hz – KabelDirekt
DisplayPort 1.4 to HDMI Adapter - 8K
6 Foot DisplayPort 1.4 Male to HDMI 2.1 Male Cable, UHD 8K/60Hz, 4K/120Hz
What is DisplayPort 1.4?
DisplayPort - Wikipedia
Accell mDP to DP 1.4 - VESA-Certified Mini DisplayPort to DisplayPort 1.4 Cable - 7 Feet, Hbr3, 8K @60Hz, 4K UHD @240Hz : Electronics
Displayport 1.4 Cable (8K Compatible) – BitWare Store
DisplayPort 1.4 Cable 8K@60Hz 4K@144Hz 1080P@240Hz 32.4Gbps for Gaming
Mini DisplayPort V.1.4 (Thunderbolt) Monitor Cable M/M 2 m - DisplayPort Cables - Multimedia Cables - Cables and Sockets
8K Fiber Optic DisplayPort 1.4 Cable (8K @60Hz, 4K 144Hz, 1440p @240Hz
DisplayPort 1.4 Early Certification Available! Grasp the Latest DP1.4 Trends, Technology and Certification Service
6FT Displayport 1.4 Cable 8K Display Port 2.0 Cable 144Hz DP1.2 to DP HDR Nvidia