Happily trying to upgrade RAM and second nvme to my Inspiron 16 Plus just to discover someone smart at dell installed the M2 2230 drive in the 2280 slot and left open
4 GB Dell New Certified Memory RAM Upgrade Dell Inspiron 14R-N4010-Laptop SNPX830DC/4G A3944761 at Amazon.com
parts-quick 8GB Memory for Dell Inspiron 15 (3565) DDR4 2400MHz SODIMM RAM at Amazon.com