Doesnt matter if she is an accountant. Once the filings are prepared- they still need to be reviewed/audited by a 3rd party auditor to get their statement on validity. This is where most of the delays come in. Specifically for small companies. There are just under 4000 actively traded public companies (and 2-3 times that for OTC/Pink which have various levels of reporting) and 365 days in the year. That means on any given day - hundreds of Qs and Ks are due. Since most go by month end days on actual quarters - most are due on really 12 days out of the year - maybe 24 if you include the 15th as a common quarter end date. This means there is very high demand for a relatively limited number of accredited auditors. Those that pay significantly more get their reports done first. This is why many micro caps reporting with SEC so often file extensions - it is more cost effective to "wait." That doesnt mean they are hiding anything or incompetent - its just business.
I really have no opinion on her/the company as far as history being a guide before BMXC and even then - I have a relatively small position so I have not done my usual DD. however, she does seem to have a track record here of decent to solid transparency so even if she filed for an extension - it wouldnt cause me significant alarm. If an auditor found something in the normal review process that required more detailed understanding-it would make sense that they would set them aside and get the rest of their workload reviewed/submitted on time and then come back to this one. In that situaton - filing an extension would be normal/rational.