Correct, it's not a 2230. Standard NVMe drives combine the NAND and controller onto a single module, but Apple Silicon machines have the SSD controller built into the main SOC, and the SSD module is just the raw NAND chips.
I searched for Mac Studio SSD upgrades, and I do indeed see modules that look just like the one in the picture. Not cheap.
I searched for Mac Studio SSD upgrades, and I do indeed see modules that look just like the one in the picture. Not cheap.