So my monitor " Acer Nitro 23.8" Full HD 1920 x 1080 PC Gaming IPS Monitor | AMD FreeSync Premium | 180Hz Refresh | Up to 0.5ms | HDR10 Support | 99% sRGB | 1 x Display Port 1.2 & 2 x HDMI 2.0 | VG240Y M3biip" says it can go to 180 hz but i don’t see the option in settings
That monitor only supports HDMI 2.0 and Display port 1.2 which both max out at 4K 60Hz.
Somehow you seem to have it set to 4K despite it only being a 1080p panel. Higher refresh rates should become available if you set the the monitor to run at its native resolution of 1920x1080.