Definetly wait at least 2 weeks after a regurg to feed again.

Regurg can be due to handling too soon, too low temps, parasites, etc.

Since you got them, how often have you tried feeding? Did they regurg each time?

Are they housed together?

What size caging? What substrate and where are you measuring temps?

Most caresheets I've found say 90 hot end. The breeder I got mine from said 90-92. Well, I found out my little guy likes it a bit hotter - as I've heard is sometimes the case with Sand Boas.

Do you see them use both sides of the cage or just one?