Can my wife get a Non-O trailing spouse visa while on a COVID extension if I hold a Non-B visa and work permit?

A user queries about the possibility of their wife obtaining a Non-O trailing spouse visa while she is on a COVID extension and he holds a Non-B visa with a work permit. A commenter confirms that she should be able to apply for a 90-day Non-O visa based on their marriage, provided she has enough time left on her current stamp for the application process.