What is the wireless performance for EM7565

how can we identify the wireless performace

do you mean measuring throughput?

that is correct.
how would we be able to measure the performance

Have you tried to use speedtest in web browser after establish data channel by em7565?

No, was looking to see if there is any info/data.
as I was not able to find any on the spec sheet

Here says it is LTE cat-12 with data speed: