The Thunderbolt 3 standard has been available for roughly four years now, but cable lengths have so far generally been limited to a couple of meters
Sonnet Introduces Thunderbolt 4 Dock With Up to 90W Charging for Macs, Page 2
OWC Releases Affordable Thunderbolt 4 Cables - Article Comments - TidBITS Talk
Review: Corning's 33-foot Optical Thunderbolt cable allows you to move your Thunderbolt devices (or Mac) far away from your desk - 9to5Mac
Total Nightmare: USB-C and Thunderbolt 3 - Stephen Foskett, Pack Rat
Corning's Optical Thunderbolt 3 Cables Now Available in Lengths From 5 to 50 Meters - MacRumors
Review: Corning's Thunderbolt Optical Cable
Testing out 50ft Corning Thunderbolt 3 fiber cable for remote location of M1 Ultra Mac Studio. : r/MacStudio
Thunderbolt Optical Cable by Corning 60m
Review: CalDigit's 'TS3 Plus' Dock Gives You 15 Ports, 85W Charging, and an SD Card Reader for $250 - MacRumors
PSA: For Thunderbolt 3 over distance; use *OPTICAL Thunderbolt 1/2 cables!*, Page 2
Review: Corning's Thunderbolt Optical Cable - General Discussion Discussions on AppleInsider Forums