Has anyone had luck with 4K @120Hz using a Sonnettech 13 Thunderbolt 5 SSD Dock?

[dwightras]

14" 2021 Apple M1 Pro running macOS 26.2 and BetterDisplay 4.1.1 Build 47018 will run 4K @120hz fine when attached to my OWC Thunderbolt Go with JSAUX-HDMI-2.1-48G HDMI cable connected to an LG B4 48" 4K TV (modified EDID to Interface 1.4 DP). When I attach the same Mac to a new Sonnettech 13 Thunderbolt 5 SSD Dock I can't get 4K @120hz on a 48" LG C5 (modified EDID to Interface 1.4 DP) using any of the following:

• Cable Matters 201462-BLK-6 Thunderbolt 4 to HDMI 2.1 Cable, No Firmware Update Needed
• Cable Matters 201388-A w/ flashed firmware -> JSAUX-HDMI-2.1-48G
• Anker 518 -> JSAUX-HDMI-2.1-48G
  Has anyone else used the Sonnettech 13 Thunderbolt 5 Dock and successfully gotten 4K @120hz? Anything I'm missing or need to change? Thank you in advance for any help and/or ideas!