We [0] did for a while - discovered by the same dev as found SSSL — and sat on it for a long time at Kaeru, but it was independently discovered [1] and reported to Nintendo by someone else, so it unfortunately got patched before EoL.

[0]: https://twitter.com/KaeruTeam/status/1340021213352128512

[1]: https://github.com/MrNbaYoh/3ds-ssloth

It doesn't seem like it, though I'd recommend modding your 3DS anyways. The process is pretty short and painless, and It becomes a really cool piece of hardware that can run GBA/DS/3DS games, has a working Virtual Boy emulator, and can easily retrieve patched games (useful for undub's, fan translations, and romhacks). And, now, can connect to the Pretendo network.