Reminder that the "nm"-node names do not correlate to any physical feature size directly and have been mostly marketing terms for the last ~20 years. Nowadays, "1.4nm" just means vaguely better than the "2nm" process.
On the "3nm"-node, wikipedia
The term "3 nanometer" has no direct relation to any actual physical feature (such as gate length, metal pitch, or gate pitch) of the transistors. According to the projections contained in the 2021 update of the International Roadmap for Devices and Systems published by IEEE Standards Association Industry Connection, a "3 nm" node is expected to have a contacted gate pitch of 48 nanometers, and a tightest metal pitch of 24 nanometers.
Still impressive, of course, but quite misleading.