@ncage A little disappointing to see no one in support has answered your question with a simple, yes or no even. 😣

  @WYLDSTALLYNS  I agree especially considering this is one of the main reason I chose this mesh sy

  @ncage 

The backhaul will always attempt using all bands.

You should configure and name the 6ghz wireless only if you want to use it for some devices.

  @ncage I just got off of "Live Chat" with TP-LINK for this exact question. They said that the old choise of 6ghz dedicated backhaul or 6ghz backhaul & WIFI has become automated. It is basically 6ghz backhaul & WIFI ALL the time. However, if the slave unit is too far away, it will resort to 2.4 or 5ghz. So it's basically all automatic now. Including if you use ethernet; it will know.

MY PROBLEM however is: How do I know if the backhaul is using 6ghz, 2.4, or 5ghz. Whichever band it is using for backhaul, WILL TAKE from the available bandwidth of that band. When I look at my deco slave unit, it says connected to main deco unit: (2.4ghz/6ghz/5ghz_1). So, I can only ASSUME that it sees all 3 bands and is "Intelligently" choosing the 6ghz band. I would rather it say straight up which band it's using, so I know if I am placing the slave unit too far away, and it's choosing the 2.4 or 5ghz band because it's a stronger signal.

  @Mikis The backhaul has always been fully automatic.  Usage of 6GHz to connect the wireless devices has always been optional, I believe. 

If a satellite is showed as connected via several methods (bands) to another Deco, it means they communicate via the combination of those methods.

If one of the band does not allow communicating, it will not be showed in the list of methods used between two Decos.

There is no reason to believe that 6GHz is always better than the others, or to assume it is better to communicate via a single band.

  @Mikis 

The backhaul will use the various bands in order to reduce the latency.

Hence, depending on the physical environment, and depending on the traffic, the Deco will dynamically choose the optimal band for each packet transmitted on the backhaul.

If, in your specific setup, the 6ghz band can handle a larger throughput between two Decos, the Deco will detect that, and use that band for the backhaul, as long as the traffic does not require using more bands.