What is the advantage of multiple antenna in receiver in energy harvesting ?harvested more power? What is the advantage of multiple antenna in receiver in energy harvesting ?

Assume there are $3$ transmitted antennas in the A device,and $1$ received antenna in the B device,now assume A device use beamforming with $3$ antenna to transmit some signal to B device,and B device harvest $0.1W$ power from the signal.

Now if i add one more received antenna to device B,that is, there are $2$ antennas in B device now,and assume these two antennas are very closed,how much power will device B harvest now? still $0.1W$? or $0.1W\times2$ ?

I am confused about this question,because if device B still harvest $0.1W$,then what is the advantage  of multiple antenna in receiver in energy harvesting ?

If device B harvest $0.1W\times2$,and this mean if i want to create power,i just use $1$ antenna to transmit 1W RF power to a receiver with $\infty$ antennas receiver,then i can get $0.1W\times \infty $ power ,but it is impossible .
After thinking,i think when the antenna number of device B become 2,the harvested power of B will not become $0.1W \times 2$,WHY?

Because when there is just one antenna in B device,the beamforming direction just aim that antenna,because just that antenna has to receive or harvest the signal,so that antenna can harvest all the RF energy

However,if the antenna number become two,device A has to let both of two antenna of B receive or harvest the signal,so the beamforming direction has to change,maybe the middle of these two antenna,so now first antenna will harvest about $0.05W$,and the other will receive $0.05W$ as well.Or perhaps $0.06W$ and $0.04W$,but the total power will not be larger than 0.1W