Powerline 13 in 1 doesn't provide high resolution to both HDMI monitors

I have 2 high resolution Dell 27 inch monitors (2560 x 1440) connected to my laptop, both HDMI, and only one will display at that resolution. The other defaults to a 1080 resolution. If I try one HDMI and one Display Port, the display port monitor is not recognized at all.

How do I get high resolution on both monitors?

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