The wireless chipset's Wi-Fi frequency (Ghz or MHz) and Wi-Fi output (dbm) MacBook Pro 13' 2017 touch bar
I'm not sure how much this answer will help, but unless I'm missing some finer details in your question, the Wi-Fi bands supported are 5GHz (IEEE 802.11ac natively) and 2.4GHz (via backwards compatibility with the 802.11n specifications).

I'm not 100% certain on the radio output power, but typically Apple hardware is rated at 20 dBm (nominal). 

If it helps, all Apple hardware fully complies with IEEE specifications and meet the legal regulatory requirements for all regions to which they sell directly. And, just for the record, Apple does sell these models directly in Taiwan.

Also, by default Apple designs these products to ensure their devices


do not exceed the level of allowable transmitter power, the different available channels, and the times those channels can be occupied. 
will not transmit at a power above what is allowable in any nation to which they sell, nor will their products use frequencies that are not permitted in any nation.