Thunderbolt 3/4 cable/hub/whatever to HDMI 2.1 for 4k/120hz output

[TTL.TM]

Hi! I cannot find (it seems) a cable that can do 4k 120hz over thunderbolt 4. I have a Asus Vivobook with only 2 video outputs: a thunderbolt 4 and a measly HDMI 1.4b.

I want to pair it with a Sony 4k/120hz TV over a hdmi 2.1 but I cannot find a proper cable or adapter. I did get a cable from "unlink" that supposably can do even 8k60hz and had good reviews on Aliexpress (in my Romania I cannot find anyone that sells anything close to this). All drivers are up to date, bios and everything on the latest firmware and still I cannot even go past 4k30hz. I tinkered a bit on the HDMI 1.4b though and managed to lower format to 4:2:2 and reached 4k60, but on the thunderbolt port I had no such luck. I have it plugged in the right ports on the TV and all seems ok but still refuses to work.

Can you point me in the right direction? The notebook has a 3050 mobile without a mug switch and a 11th gen i5 cpu. I'm also attaching a screenshot of the cable used.

[Kilrah]

57 minutes ago, TTL.TM said:

I have a Asus Vivobook with only 2 video outputs: a thunderbolt 4 and a measly HDMI 1.4b.

What laptop exactly?

If the HDMI port is 1.4 It's likely that what's fed to the Thunderbolt controller is also 1.4.

It's not because the port can carry way more that what's behind uses it to full capacity.

[TTL.TM]

It's the N7400PC variant from here:

https://www.asus.com/laptops/for-home/vivobook/vivobook-pro-14x-oled-n7400-11th-gen-intel/techspec/

Why would they advertise thunderbolt 4, if they are nerfing it to the floor? That's just evil. I'm hoping otherwise, else I'm stuck on 4k30 or 60 but a bad 60hz on a otherwise excellent 2021 laptop...

[seanondemand]

The supported resolution on your machine isn’t limited by the TB4 port, but by the displayport signal sent to the thunderbolt interface, which it’s pretty safe to assume only goes up to 4k60 if it’s got an hdmi 1.4 port.