Zend certified PHP/Magento developer

Why does Windows 10 recommend a 1080p resolution when connecting to a 4k TV?

I have a Thinkpad T495 connected to a 4K Samsung TV via HDMI and display settings set to ‘extend these displays’. When I first connected the laptop, the TV’s resolution was set to 1080p. I had to open up the display settings and manually change to 4k.

Edition Windows 10 Education
Version 20H2
Installed on    ‎6/‎9/‎2020
OS build    19042.1110
Experience  Windows Feature Experience Pack 120.2212.3530.0

It works fine now, but I was wondering what factors go into Window’s recommendation of the resolution

Windows settings showing 1080p as the recommended resolution