iPad OS has much better HiDPI support for 2K displays than macOS

As mentioned in the title, with the same 2K monitor, HiDPI cannot be turned on by default in the mac connection, but using the iPad connection, you can see that it is obviously clearer and the font is smoother than the mac connection. I tried to get the external screen resolution with js while connecting the iPad, but the result displayed seems to be incorrect, because the ratio of the 16/9 screen should not be the following resolution combination. I tried the built-in external screen browser shows this result. https://cn.screenresolution.org/ The resolution you are using is 1192 x 1590 ————- After calculation, the rendering logic resolution of the external 2k display resolution is 1646 x 926