External sharing recommendations?

Our Teams environment is fairly restrictive when it comes to external sharing.  We do not permit OneDrive external sharing, and Teams sharing is disabled except for guest accounts that IT creates.  That has become a bit of a pain when we need to provide access to external entities that might need just a one-time access for files. Creating a guest account for a one-time/short-term use takes time and seems administratively cumbersome.  Anyone have any suggestions for these sort of needs?