SQLite benchmarks are deeply flawed. Somebody has proven that it can sustain 4M queries per second on bare metal, 1.5M qps on a cloud VM, and it happened over 7 years ago. Therefore I do not believe any number from SurrealDB.
The repo is open source, so why not raise a PR to https://github.com/surrealdb/crud-bench and point out any misconfigurations you find? It's good that they've made it open source, so can easily point out if there are any misconfiguration.