BotW runs better on newer versions of the Switch than the original model, IIRC it was something like the chip revision in the updated battery and OLED variants slightly increased memory bandwidth or something along those lines, pretty sure Digital Foundry did a bit on it back in the day.
Just a shame there won't be a Switch 2 in time for this, the Pro sounds like its got canned at this point due to a combination of the chip shortage, and it now being too late in the life cycle, but the base model Switch is really beginning to feel crippling, and I am sure chip technology has moved on sufficiently since the original chip was designed, to produce something SUBSTANTIALLY faster in the same size/heat/power/cost envelope now, as if I remember right it's essentially a 2014 design, so almost a decade at this point!
Knowing Nintendo they're too stubborn to actually do a Switch 2, even though we love the hybrid gimmick.
I really do need to go back and replay/finish BOTW, my wife ended up stealing it for a long time, and I helped her with a chunk of it, but my own playthrough got shelved for various reasons some time ago.