@Solla-topee 

Nice! Thanks for sharing, this is pretty much what I was requesting in this thread

Flashed onto my BE68 3-pack, and haven't observed any issues so far on my network of 20+ devices.

DOH is working fine as well, from https://one.one.one.one/help/

  @Solla-topee 

What's different in this thread? There are now 2 of them tracking the same beta firmware

https://community.tp-link.com/us/home/forum/topic/864118

  @Kryptonite 

Hi,
The thread(https://community.tp-link.com/us/home/forum/topic/864118) is in the US community.
Best Regards

All still good with the beta firmware, but the caveat is that I use a specific set of settings:

Wifi network: 2.4, 5 and 6GHz - all 3 bands enabled
-but with 2.4GHz at 20MHz, 5GHz at 160MHz, 6GHz at 320MHz

-2.4 and 5GHz on WPA2/3, 6GHz on WPA3 only

MLO: 2.4GHz disabled, only 5 and 6GHz enabled, WPA3 only

Others:

IOT network disabled

Guest network disabled

IPv4 only (IPv6 disabled)
Fast Roaming - Enabled

SIP ALG - Disabled

UPNP - Enabled

My backhaul is Wireless, not wired

Wireless network mode -  Stable mode

-i.e all 3 Decos connect to each other on 5+6GHz only (the Ultra-speed mode also enables a 2.4GHz interconnect, hence I don't use that)

And here's the kicker: One single SSID/Password for all active networks, the individual bands and MLO

The reason I have it setup this way is 

-I primarily hate having separate SSIDs, and this was the only combination of settings that allowed all devices to auto negotiate to their best bands possible and have the Deco manage them.

-One of my biggest goals really was to have 3 Decos well placed strategically with a strong enough signal throughout the house, to ensure none of my capable devices need to drop to 2.4GHz due to their distance from the router. This allows most devices to stay on the 5GHz band, and the new bleeding edge devices to get onto the MLO/6GHz band

-This allows me to then extend maximum compatibility on the 2.4GHz band for all the slow/old devices to connect

And with these settings:

-All IOT devices connect to the 2.4GHz band anyway, and work well
-All other devices that aren't IOT, but are Wifi 5/6/6e get onto the 5GHZ or 6GHz band.

-All Wifi7 devices get onto MLO, and are asked to combine 5+6GHz, and if they don't support that combination, stay on 5GHz or 6GHz only

And everything works well on the beta firmware, and everything used to work well on the older public firmware release as well

I had tried playing with these settings before, and tried it now the new firmware as well, and the observations are the same:

-If I change the 2.4GHz band to 40MHz, some of the IOT devices drop off (1 of my 2 cameras, 1 of my 3 smart lights, and occasionally my printer too)

-If I change from Stable mode to Ultra-speed mode, I have the same issues as above

-if I enable the 2.4GHz band on MLO, My phone for example connects to 2.4+5GHz MLO, but is actually slower than 5GHz only

-if I enable SIP ALG, my phone's Wifi-calling has disruptions

Are the above bugs/issues? Maybe, but they're not new, have always existed atleast with the combination of devices I have, and I found a way to work around and get everything to function to my liking.

I checked all of the above observations with the new beta firmware, and everything remains the same, so I continue to use the same settings as before, except that I now have DOH & DOT set to DOH enabled.

Hope that helps