The GeForce RTX 3070 Ti and 3080 Ti are pending a release and from the looks of it, it seems that the 3080 Ti will be released first followed closely by the 3070 Ti.
Possible shelf availability dates of the RTX 3070 Ti and RTX 3080 Ti surfaced over at Wccftech report. The RTX 3080 Ti is expected to become available on June 3, 2021, likely reviews go live on June 2. The RTX 3070 Ti would follow suit a week late around June 10, with possible reviews on the 9th.
Little is known about volume availability and stock or pre-orders. But for now, this seems to be the indication of the release window for the two new products.