Can 1.4 hdmi 120 FPS at 1080p I’m very confused

Make sure you're plugging it into the HDMI 2.0 port and not the HDMI 1.4 port, you may be in the wrong one.

And also, some monitors just don't support 1440p at 120-144hz, some only support it at 1080p 120-144hz. It's an HDMI and screen limitation.

HDMI 1.4 is suitable for supporting 144 Hz at a resolution up to 1080p. However, there are some specific monitors that can only support up to 120 Hz at 1080p resolution. So, you should check that first if your monitor is capable of handling 144 Hz over HDMI.

I do not have an option to go to 120 hz it will let me do 1080p but doesn’t give the option to go to 120 hz but looking now it has a hdmi 1.4 will that run 120 hz and if I didn’t get it to work will a hdmi to display port connector run 120hz with the the series s

To a degree you don't need a tv that supports HDMI 2.1 to play supported games 120 FPS.

I bought a 4k/HDR LG tv about three years ago and it's HMDI 2.0 but it doesn't support 120FPS at 4k but if I went into the settings of my Xbox Series S and X and changed the resolution from 4k to 1080p I can then set FPS to 120 as my consoles tell me I can play 120 FPS games at 1080p.

hi i would like to have 120 fps on my tv with my serie x , i take yu a screenshot of settings tv, i dont understand why in settings xbox they dont proposed 120 fps at 4k but i can play 120 fps at 1080p ?

You won't get 120 fps on that TV, as it's only a 60hz display, 60hz = 60 fps at most

To get up to 120 fps at 4K, you need a TV that supports 120hz and has HDMI 2.1 ports and again your TV only has HDMI 2.0 ports, but most games on the Series X are locked to 60 fps at 4K,

Something like the LG CX is the best TV to get at the moment, and that's a TV that can go 4K at 120hz,

A 60hz display = up to a maximum of 60 fps

A 120hz display = up to a maximum of 120 fps.