There is also absurd-sql [1] that is sqlite3 in wasm using IndexDB as storage and it’s faster than IndexDB itself.
The article briefly mentioned about Dream [2] web framework but sadly, the author has stopped maintaining the library and noone has stepped up yet. So the whole web story with OCaml isn’t good yet.
[1]: https://github.com/jlongster/absurd-sql [2]: https://aantron.github.io/dream/