I have a Pixel 9 Pro XL and I noticed using a single band like the 5Ghz or 6Ghz band is faster than using MLO. For example using the 5Ghz band I'm capping out around 1.8Gbps and 2.2Gbps Up and Down when using the 6Ghz band. While using MLO I'm only able to reach 1.4Gbps down and 1Gbps up. I'm running a speedtest locally eliminating the external network to test the hardware. Any suggestions? 

I followed this guide to configure it, I even tried factory resetting the router and reconfiguring it. https://community.tp-link.com/en/home/forum/topic/672416