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CYW43438 chip does not have FCC ID but the corresponding partner module such as Murata type 1LD is a "reference" certified module for FCC and IC. It requires an external antenna. From the module datasheet, the module FCC ID: VPYLB1LD and IC ID: 772C-LB1LD. The datasheet along with spec information is available here https://wireless.murata.com/type1ld.html. There is also a Murata FCC Regulatory Certification Guide available here New Murata FCC Regulatory Certification Guide... for your reference.