Can an L2 visa holder can apply for Bi B2 Visa

Hi everyone,
I’m asking on behalf of a friend. She currently holds an L2 visa and is working in India for an MNC . Her husband is in the U.S. on an L1 visa working for diff company. Now, her company wants her to travel to the U.S. for work purposes, but not as an L2 dependent—instead, they’re asking her to apply for a B1/B2 visa through the company.

Is it possible for someone to hold an L2 visa and also apply for a B1/B2 visa at the same time? Can both visas be valid concurrently?