Amazon.com: MCE Technologies 512GB SSD Compatible with MacBook Air 2015 and Compatible with MacBook Air 2017: PCIe-Based 4 Lane (x4) NVMe SSD Flash Storage Upgrade - Requires macOS 10.13.x (High Sierra) or
Can I update the SSD of the 2019 MacBook Pro/Air 128 GB? - Quora
Rumor: Apple soldering MacBook Air SSD to motherboard (and why it's a bad idea) (updated 2x) | ZDNET