MikroTik

Hello Guys,
I Have RBOmniTikPG-5HacD Brand New With 6.48.7 factory Firmware.
All The devices connected to the Antenna Have High Signal meanwhile the longest range is 200M
Can Somebody Help me Please
Thanks is advance..

Help with what exactly?

200 meter is quite a distance for wifi with horizontal omnidirectional antenna.

What do you understand about " Antenna Have High Signal "

EIRP regulations (ETSI for Europe, ANSI for US) limit the transmit power in the strongest direction (the direction with the highest antenna gain).
If the EIRP limit is reached, then a stronger antenna gain will not increase the transmit power in the strongest direction, it will only decrease the weaker directions.

Antenna gain value in RouterOS, is the gain number used for these EIRP calculations, it does not influence the electronic hardware characteristics.

High gain, is very good for weak received signal improvement.

Wifi is bi-directional, you have to consider antenna gain and power of both ends.
Omnitik-Omnitik at MCS0 (=slowest rate!) is documented as 8km, 600m for MCS7, with free Fresnel zone (!)
https://mikrotik.com/products/ptp and https://www.everythingrf.com/rf-calcula ... calculator

before upgrading to omnitik5Acpoe
i had OMNITIK5
all the access point signal connected to the omnitik5 are good
meanwhile i used the same config (frequency and band)

And you still did not specify what the actual problem is...