Derived from screen's EDID (which seems to be wrong - bad checksum) using wxEDID, cvt_modeline_calculator. It's a pitty the embedded controller doesn't have hardware rotation because the screens orientation (portrait) seems to be the source of all evil.
On Windows machines the screen does run in FHD, HD and QHD modes. The resolutions below are only full HD, the "b" mode worked best for me.
export DISPLAY=:0
xrandr --newmode "a" 116.148 1080 1112 1144 1184 1920 1928 1932 1936 -HSync +VSync
xrandr --newmode "b" 137.533440 1080 1112 1144 1184 1920 1928 1932 1936 -HSync +VSync
xrandr --newmode "c" 114.611200 1080 1112 1144 1184 1920 1928 1932 1936 -HSync +VSync
xrandr --addmode HDMI-1 "a"
xrandr --output HDMI-1 --mode "a"
xrandr --verbose
Windows
a (0x374) 116.148MHz -HSync +VSync
h: width 1080 start 1112 end 1144 total 1184 skew 0 clock 98.10KHz
v: height 1920 start 1928 end 1932 total 1936 clock 50.67Hz
Linux 60Hz
b (0x37b) 137.533MHz -HSync +VSync
h: width 1080 start 1112 end 1144 total 1184 skew 0 clock 116.16KHz
v: height 1920 start 1928 end 1932 total 1936 clock 60.00Hz
Linux 50Hz
c (0x37e) 114.611MHz -HSync +VSync *current
h: width 1080 start 1112 end 1144 total 1184 skew 0 clock 96.80KHz
v: height 1920 start 1928 end 1932 total 1936 clock 50.00Hz
Sidenote - correct 60Hz mode for non-FKMS (legacy) video driver
[pi4]
#dtoverlay=vc4-fkms-v3d
max_framebuffers=2
hdmi_driver=2
hdmi_group=2
hdmi_mode=87
max_framebuffer_width=1080
max_framebuffer_height=1920
display_rotate=0
max_usb_current=1
config_hdmi_boost:0=10
hdmi_force_hotplug=1
hdmi_timings:0=1080 1 26 4 50 1920 1 8 2 6 0 0 0 60 0 135580000 3
xrandr --newmode "b" 137.533440 1080 1112 1144 1184 1920 1928 1932 1936 -HSync +VSync
xrandr --addmode HDMI-1 b
xrandr --output HDMI-1 --mode b
xrandr --newmode "1080x1920_60.00_rb2" 137.46 1080 1088 1120 1160 1920 1961 1969 1975 +hsync -vsync
xrandr --addmode HDMI-1 "1080x1920_60.00_rb2"
xrandr --output HDMI-1 --mode "1080x1920_60.00_rb2"
xrandr --newmode "b" 165 1080 1112 1144 1184 1920 1928 1932 1936 -HSync +VSync
xrandr --addmode HDMI-1 "b"
xrandr --output HDMI-1 --mode b
xrandr --newmode "bb" 148 1080 1112 1144 1184 1920 1928 1932 1936 -HSync +VSync
xrandr --addmode HDMI-1 "bb"
xrandr --output HDMI-1 --mode bb
xrandr --newmode "bbb" 149 1080 1112 1144 1184 1920 1928 1932 1936 -HSync +VSync
xrandr --addmode HDMI-1 "bbb"
xrandr --output HDMI-1 --mode bbb
xrandr --newmode "bbbb" 138 1080 1112 1144 1184 1920 1928 1932 1936 -HSync +VSync
xrandr --addmode HDMI-1 "bbbb"
xrandr --output HDMI-1 --mode bbbb
xrandr --newmode "c" 139 1080 1112 1144 1184 1920 1928 1932 1936 -HSync +VSync
xrandr --addmode HDMI-1 "c"
xrandr --output HDMI-1 --mode c
xrandr --newmode "d" 137.533440 1080 1112 1144 1184 1920 1928 1932 1936 -HSync +VSync
xrandr --addmode HDMI-1 "d"
xrandr --output HDMI-1 --mode d
xrandr --newmode "e" 138.5 1080 1112 1144 1184 1920 1928 1932 1936 -HSync +VSync
xrandr --addmode HDMI-1 "e"
xrandr --output HDMI-1 --mode e
xrandr --newmode "f" 138.8 1080 1112 1144 1184 1920 1928 1932 1936 -HSync +VSync
xrandr --addmode HDMI-1 "f"
xrandr --output HDMI-1 --mode f