Are you using the 5.8GHz or the 2.4GHz? Be sure to configure them with different SSID's -- Do not use band steering. Often Win10 will do this if there is a lot of interference on the wireless...

I should have added this is using the current firmware (2.7.0) on my EAP225's(V3) and the OC200.

Do you have the OC200? I just enabled a throttle on my iPhone though the Omada iOS app (connected to my on premise OC200) and limited the download and upload to 1024 kbps (aka 1Mbit/sec). It took...

Should also add, that I have ~40 clients on my home TP-Link solution. But many of these are IoT, etc. I have about 10 or so laptops, ipads, Roku's actively streaming / gaming / etc. at any give time....

Hello! There are many articles on the Interwebs about proper wifi network design (look for hexagonal honeycomb layouts) Like this document (from a competitor)...

I should have added, that I also have MESH enabled. But as others have said this is separate and unrelated to roaming. I have two EAP225 V3's currently in my smaller home. Ideally I would get one...