It was apparently only up for a very short time before being taken down, but according to this guy who originally found it: https://twitter.com/witeken
It could feasibly see a 20% clock speed increase at the same power/heat over the Intel 7 process.
They also leaked a shot of a Meteor Lake Die
This would indicate that Intel has caught up to TSMC with their TSV and Interposer packaging.
Looking forward to seeing what team Blue can bring to the table in 2023.