Non on ne peut pas BLSS sans bombe, car c'est la bombe qui pousse constamment Link, ce qui lui permet de se déplacer. Avec juste un arc dans la main, Link va rester sur place comme si tu essayais de BLSS en 1.8.0+.
No, bow smuggle alone doesn't permit to BLSS, because it's the bomb that constantly pushes Link, allowing him to slide. With bow smuggle, Link will stay on the same spot as if you tried to BLSS on 1.8.0+ versions.
Version 1.8.0 is very recent and with the Switch 2 release, a lot of changes are being discussed right now, so the new rules might take a bit long before coming. However it is certain that the newest version will still be allowed in the next rules, so even if there's a lot of uncertainities at the moment, you can still speedrun in your version. By the way if you're wondering what the 1.8.0 great plateau route is, it's the one from before BLSS was discovered.