I like to have the lever on the right, it’s my dominant hand so it makes sense. Got it on the left on my 1×10 bike just for neatness though and it still works. I don’t drop or raise while braking though, not a very good idea regardless of where the lever is…
And yeah, for reasons of total rockshox weirdness, their lever is much better upside down. If I were a cynic, I might think that their decisions to mount the lever in a really vulnerable location, and to make it a bit delicate, and to charge an absolute fortune for replacement parts, are not totally separate 😉
You might want to do a little googling to see how well it’ll fit with your brakes and shifters though, dropper post lever location can be a hot topic.