[vitaminCPP]

SQLite would require a file system. Embedded systems typically do not have this.

[ComputerGuru]

SQLite doesn’t require a file system per se, as you can create an in-memory db and then use vfs to load/write the actual data from/to your IO layer.

[interroboink]

Though note you can define your own "Virtual File System" (VFS) for SQLite to use[1]. It might be a bit of an undertaking, but I think you could use that to run on just about anything with storage you control. (I haven't done it myself, just some research back in the day)

[1] https://www.sqlite.org/c3ref/vfs_find.html