@miankamran7100
When measuring the bandwidth, the program generating the traffic cannot be run on the device in question. You must use devices with sufficient performance, LHG 5 and SXTsq 5 Lite devices use a processor that is able to generate TCP traffic in both directions no more than 50 Mbps and the processor load will be 100%. It seems that this is the figure you measured
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Please look at this images
What new things do you want to hear?
These pictures show that the points are connecting at a maximum possible channel rate of 300 mbps. Which is about 200 mbps of usable bandwidth, but since the link is half-duplex it would be about 100 mbps in full duplex.
The following picture shows the maximum speed the processor can generate. Run TCP transmit or receive only and the processor will be able to generate up to 80-100 mbps of traffic, run UDP transmit or receive only and the processor will be able to generate around 180-200 mbps of traffic. It was explained to you that you do not see the bandwidth of the wifi channel, but the speed that the processor can generate.
PS To improve the performance of the wifi bridge you need to reduce the power on both sides by about 15 -18 dBm. So that the signal level is not -34/-33dB, but -50/-50dB. Because of the very strong signal you have a low CCQ.