I've been trying to zap Galia into a female since before the zapper update, but whereas the old zapper v2 used to change my pets' sexes all the time, it hasn't happened to me once since the update. Has the new zapper changed the sex of anybody else's pet? Have the chances of this outcome been reduced? Or is there some easier way to change a pet's sex that I'm not aware of, like a potion?

I don't know about changes to the likely hood of getting it in the zapper but the changes a pet between male and female and the makes the pet neutral.

A very kind user actually just sent me a sex berry (I feel so silly), but the genderless berry is something I was entirely unaware of. Does it just remove the symbol from each pet's page, so it's a blank space?

That's my genderless pet with an o symbol.

Thank you, the genderless pet thing is a really cool mechanic!