Tamron has already released two FE zoom lenses, now the third zoom lens is confirmed, it will be Tamron 70-180mm f/2.8 Di III RXD FE lens. This lens will be a super compact telephoto zoom lens compared to FE 70-200mm f/2.8 GM lens.
The official announcement for Tamron 70-180mm f/2.8 Di III RXD FE lens is in October, 2019. Stay tuned.