There is no requirement for 2 months prior when applying for a Non O from a visa exempt - unless you use the Jomtien office - they are the only office that seems to require that.
At many offices you can apply for another extension but it will be refused and you’ll be given 7 more days to stay. Some will date it from the day you apply, not add them on.
People have done it. The rules technically say you need to be in the country you are applying from for the duration of the application.
As others have said they may ask you for an interview or copies of every page of your passport. If you can’t attend or provide those they may see that you are no longer in the country and can cancel the application.
Your call. You can try. You might get lucky. You might not.