No, the Sony A7C II is not compatible with the Sony Tough G 128GB CFexpress Type B.
Sony A7C II supports SD cards only — no CFexpress slot of any type. CFexpress Type B cannot be used. Its single slot takes SD/SDHC/SDXC UHS-II cards only.
What works instead
See all compatible camera for the Sony A7C II →“This camera supports only SD memory cards (UHS-II compatible)”
Last verified:
Compatibility inferred from spec rule (citations above are manufacturer-verified)