Nice theory :-)
Let’s get practical Eh
How does the below look 
Internet===AX11000(A)===CPE610)))(((CPE610===AX11000(B)=client devices
A gets 250/25Mpbs but B gets 98/25Mbps
Basically B is just getting internet from A
Speed test on site A Archer AX11000 is 250/25 but B Archer AX11000 is 98/25
What speeds should B get?
How long you been with TP-Link?

Yes, I paid attention to physics in uni too, and didn’t skip moral science in school, some won’t even know what that is or if it ever existed. I believe in transparency, facts and the truth and hate people who make false claims.
Buy a car that advertises it can go up to 300 km and later on when it can’t go even a 101 km you are told the speedometer in the can actually can go 300 km with jargon to confuse the sh1t out of the customer. What a load of crap. When you go to buy a car you shouldn’t expect to be an automobile engineer. This is deceitful lie and people like you are encouraging this and I know why.
Let’s put it this way I call a spade a spade and some people just can have that consciousness in them. Again they missed out a science in school.

Linksys, Cisco, Netgear, Ubiquity and TP-Link now for a bit more than 15 years !!!, then pay attention to a simple question that was asked and dont beat around the bush please.

Internet===AX11000(A)===CPE610)))(((CPE610===AX11000(B)=client devices
A gets 250/25Mpbs but B gets 98/25Mbps
Basically B is just getting internet from A
Speed test on site A Archer AX11000 is 250/25 but B Archer AX11000 is 98/25
WHAT SPEEDS SHOULD B GET?

You did it, didn’t you? Beat around the bush, exactly what I requested not to do. And we are back to square one which is a simple question you couldn’t answer.
Einstein, lets leave the theory part out and come down to earth with the actual world real time scenario. In theory almost everything is possible. I’ll give you some more stats which would help you reconsider the other factors in the equation. The SNR is 93. So forget all factors. Even if you get them to face each other 1 meter apart and use all cat6 cables you can’t go to 101Mbps forget 300Mbps.
WHAT SPEEDS SHOULD B GET? If you can’t answer the above, please let it go, as you are going deeper and deeper in something not worth it. L3 TP-Link support confirmed it is not only confusing but misleading which I am surprised how the admitted and moved on. Unlike some who find it hard to call a spade a spade?