I wanted to do the aggregation enable option in my router Archer AX50 v1.0 following the instructions from this link:
https://www.tp-link.com/us/support/faq/1583/

For some reason, in my option tab there is no mode LAG option to even choose from, there is also no hash algorithm. 
I am doing it via this switch: https://www.tp-link.com/en/support/download/tl-sg108e/#Firmware

When I was using Archer C2300 it was working fine with no problem, all options were available as in instructions from link above. 

Hoping for some help.