It looks like Tamron will be updating the Tamron 17-28mm f/2.8 Di III RXD FE which will be called the Tamron 17-28mm F/2.8 Di III VXD G2 according to camera beta. You can read the translated post below:
[Tamron 17-28mm Di III VXD G2 Sony E-mount version released within this year] Get the latest news, Tamron 17-28mm Di III VXD G2 Sony FE-mount lens or release within this year, the new head will use VXD linear motor, with faster autofocus Speed and higher focusing accuracy are expected to be available at the end of the year (there were also rumors that it was in June).
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Tamron 17-28mm f/2.8 Di III RXD FE: B&H Photo / Amazon / Adorama
Tamron 28-75mm f/2.8 Di III VXD G2 FE: B&H Photo / Amazon / Adorama
Tamron 28-75mm f/2.8 Di III RXD FE: Amazon
Tamron 35-150mm f/2-2.8 Di III VXD: B&H Photo / Amazon / Adorama
Tamron 70-180mm f/2.8 Di III RXD FE: B&H Photo / Amazon / Adorama
Tamron 28-200mm f/2.8-5.6 Di III RXD FE:
B&H Photo / Amazon / Adorama
Tamron 20mm F/2.8 Di III OSD M1:2（Model F050):
B&H Photo / Amazon / Adorama
Tamron 24mm F/2.8 Di III OSD M1:2（Model F051):
B&H Photo / Amazon / Adorama
Tamron 35mm F/2.8 Di III OSD M1:2（Model F053):
B&H Photo / Amazon / Adorama
via camerabeta