The leak comes from MEGAsizeGPU on Twitter, and these two RTX 4060 Ti versions will both be announced in May and joined by the Geforce RTX 4060 8GB graphics card, which will also launch in July. The 16GB version of the RTX 4060 Ti comes as a bit of a surprise, especially considering that it is rumored to have a 128-bit memory interface.
The May date suggests we might see the announcement at Computex 2023 show, but so far, Nvidia is keeping a tight lid on official announcements or partner updates.