I am trying to connect two load cells to raspberry pi 3 using HX711 24-bit ADC.
I was wondering if we can get the output from two channels simultaneously i.e A and B .
I was wondering if we can get the output from two channels simultaneously
No you can't: -
Input A and input B are selected using a multiplexer therefore simulatanous analogue conversion is impossible. You will have to read the data sheet to see what the minimum time period is between reads but it won't be zero.