WetGeek
Just to make sure I understood you correctly: does the META key correspond to the SUPER (Windows) key on the keyboard or is it another key?
In any case, pressing SUPER+L effectively locks the session without turning off the computer.
Also, just for your information, I processed a final Solus update today (6:50 PM, French time) that concerned apparmor, kernel v 6.10.11-303 and NVIDIA driver 560.35.03.
Despite this new update, there is nothing new regarding the problems related to the hibernate and suspend functions.
So, wait and see... and as I said above, as long as it doesn't prevent us from working on the computer, we have to know how to be patient.