> I -think- SQLite with WAL falls under this

No. SQLite is serializable. There's no configuration where you'd get read committed or repeatable read.

In WAL mode you may read stale data (depending on how you define stale data), but if you try to write in a transaction that has read stale data, you get a conflict, and need to restart your transaction.

There's one obscure configuration no one uses that's read uncommitted. But really, no one uses it.