It is possible that Nvidia may have discontinued making GeForce MX discrete GPUs for laptops. With integrated GPUs such as the AMD Radeon 680M and entry-level Arc discrete GPUs like the A350M and A370M now capable of media acceleration and 1080p gaming at low to medium settings, the GeForce MX lineup seems no longer relevant.https://www.notebookcheck.net/Absence-of-laptops-with-GeForce-MX-GPUs-at-CES-2023-indicates-Nvidia-may-have-abandoned-their-entry-level-discrete-GPU.683129.0.html
Makes sense. The MX series is not purposely build, rather truncated chips, and as iGPU kept advancing, they were using already 1050 and 2050 truncated GPUs to achieve performance while lowering TDP and limiting RAM channels.
It would be more profitable for them to sell the same GPUs for full price, rather than the cheap MX series to OEM.
However, it might be a loss to customers. Intel drivers are awful, and AMD compelling iGPUs are not only few in shipments but few of their range have that capability, usually reserved for high end ultra books, while regular and more economical laptops use to feature MX450.
At least this year it seems that the only real alternative within the 500-700USD range will be the Intel Arc.