How can I transfer assembly items from QB POS to a new system?

I remember during one of the many online webinars, they distinctly said they didn’t have Assemblies. One of the many reasons, we didn’t end up switching and are sticking with QBPOS and moving merchant accounts. There might not be a perfect solution for POS out there, but from everything I’ve read and seen on this community site, Shopify is NOT it.