thunderbolt port in display input as well as output?

I posted the question below to the "older displays and monitors" topic pages, but it seems almost no-one reads it and I have not got a response to what seems to me to be a very simple question. My question basically is: can I input video from my MacBook M1 into the Thunderbolt port on the back of my old Thunderbolt 2 27" display (from about 2014), or is it an output port only? I need an alternative way of inputting video into the the display because the display's built in input thunderbolt cable is faulty.

Here is the full post to the "older displays and monitors" topic, to which I have received no reply:

Quick question about my 27" Thunderbolt 2 display, model no. A1407, circa 2014.

This has the standard Apple octopus Thunderbolt 2 input cable combined with a magsafe power connector.

I am connecting it to my 2021 MacBook Pro M1 via a Thunderbolt 2 to USB-C adaptor.

The Display has 3 USB-2 ports, one Thunderbolt 2 port, 1 firewire 800 port and one gigabit ethernet port.

Problem is, the built-in Thunderbolt input cable has become loose or frayed at the output end, and very unreliable. It only has to be lightly touched or jiggled at the output end (near the Macbook) for the screen to go black and then you have to wait for a while for the video to come back, and the computer password has to be entered again.

Someone suggested to me that I could just bypass the display's input cable and run a cable out of my MBP with a Thunderbolt 2 jack at the other end plugged into the back of the display -- using the Thunderbolt port on the display as a video input port.

So -- my question is whether the Thunderbolt 2 port on the back of my display (or any other ports) can be used as a video input port, or is it just an output port?

Thanks