If you can remember, a while ago, we have seen a similar posting, also based on a prefab Lenovo PC. This round, however, Alternate was listing a prebuilt BC, with again an unannounced GeForce RTX  3070 Ti.

It could be a typo, but the specs are specific as not only the product name got listed, it was listed with 16 GB of GDDR6 graphics memory on Alternate, an etailer proactively in Western Europe. Around the timeframe of the Radeon RX 6000 series graphics cards back in November 2020, there was speculation about a possible RTX 3070 Ti from Nvidia. The RX-6000 models have 16 GB of VRAM, while Nvidia's RTX 3070 has 8 GB.

The 3070 Ti has now resurfaced in the Lenovo Legion T7 34IMZ5. The listed page has already been taken offline. The question that remains to be this one; is this a typo or a premature shop listing. 

GeForce RTX 3070 Ti Gets Listed on Pre Built Lenovo PC from Alternate