Lenovo launched the ThinkPad L13 Gen 4 and ThinkPad L13 Yoga Gen 4 at MWC 2023 today. The L13 and L13 Yoga now feature upgraded internals to Intel 13th gen Raptor Lake and AMD Ryzen 7000 along with a few added display options including ones with low blue light emissions. Memory comes soldered on Intel variants but is expandable on the Ryzen models.https://www.notebookcheck.net/Lenovo-ThinkPad-L13-Gen-4-and-ThinkPad-L13-Yoga-Gen-4-get-Raptor-Lake-and-Ryzen-7000-upgrades-along-with-optional-low-blue-light-emission-display-options.697556.0.html
No, the L13 and L13 Yoga gen 3 did not offer upgradeable ram. The L13 has had soldered ram from gen 1.