I have updated 3 MBA with 3 Fanxiang PCIe for Mac SSDs (they have 12+16 pin connectors and do not require any adapters).
2 MBA 2015 have 8 GB of RAM and were with two 1 TB Fanxiang SSDs, then I installed the latest supported macOS Monterey and upgraded them to macOS Sequoia 15.0.1 using Open Core Legacy Patcher.
A MBA 2013 with 4 GB of RAM received a 512 GB Fanxiang SSD and is running macOS Ventura.