EAD through OPT expiring in May 2020, filed for marriage based visa

[Ruppal]

I filed for marriage based visa for my spouse in March 2020. Her EAD through OPT is expiring in May 2020. I am wondering how to ensure their is no gap in employment or how to ensure she is not let go. I have read that employers can let them be at leave until new cards arrive or read that you can work as it is technically illegal but doesn’t harm the case,employer, or company. Are these viable options? Are their any other solutions that can be done legally or expedite this process? I am in the military as well.

Thank you and stay safe