It adopts the way of Surface Mount for RF Transceiver' mounting.This RF Transceiver module utilizes the Tape & Reel (TR) package for optimized performance.
BGX13P22GA-V21R Features
Surface Mount Tape & Reel (TR) package
BGX13P22GA-V21R Applications
There are a lot of Silicon Labs BGX13P22GA-V21R RF Transceiver Modules applications.