No, the Sony A6700 is not compatible with the Sony Tough CEA-G480T 480GB CFexpress Type A.
Sony A6700 has only a single SD UHS-II card slot. Sony Tough CEA-G480T is a CFexpress Type A card — physically incompatible connector, cannot be inserted into an SD slot. Sony's memory card Help Guide confirms this camera supports only SD memory cards.
What works instead
See all compatible camera for the Sony A6700 →“This camera supports only SD memory cards (UHS-II compatible).”
Last verified:
Compatibility inferred from spec rule (citations above are manufacturer-verified)