Macbook Pro 2019 doesn't recognize 4k TV's native resolution as 4k

I have a MacBook Pro 2019 and a 50" Hisense H8G (https://www.hisense-usa.com/tv-and-audio/televisions/all-tvs/50H8G_50-quantum-4k-uled-hisense-android-smart-tv-2020). I connect the Macbook to the H8G via an Anker USB-C to HDMI adapter (https://www.amazon.com/gp/product/B07THJGZ9Z), though I've also tried 2 of Apple's USB-C Multiport Adapters (A1621).

I am running MacOS Monterey 12.4.

The (perceived?) problem: given my TV is 4k, I would expect MacOS to recognize my display as 4K natively. In some cases, it does:

When I connect my Macbook to the display, the H8G reports that it is operation in 2160P with HDR10, which sounds right.

However, when I go into Display Preferences, you can see it thinks 1080 is the default resolution for this display:

Why do I care? Well, I've noticed WindowServer process has been sucking up more than 50% of CPU and read that scaling can be a major factor. This led me to look at my scaling settings and wondering why Display Settings is forcing me to scale to 2160 when the monitor should be doing so natively.

Any ideas?

Thanks!