How could I get Xacceleration,Yacceleration and Z acceleration of a beacon and transmit it via bluetooth 5.0 to other device, for example arduino.
I think that easiest way will be to enable Estimote Telemetry packets on beacon and then write a parser on Arduino that will extract acceleration data out of them.
More information about telemetry packets can be found here: https://developer.estimote.com/sensors/estimote-telemetry/#estimote-telemetry-packets-description
Specification for telemetry packets in a form of JavaScript examples can be found here: https://github.com/Estimote/estimote-specs