Is there an online portal to check the status of Work Permit ? Also whats the success rate of getting a Spanish work visa ?
You can check the status of any in-process extranjería application here: https://sede.administracionespublicas.gob.es/infoext2/
Choose the “con formulario” option; that tends to work better than the Clave PIN option in my experience.
As for the success rate; as far as I know there aren’t any statistics published about that. But, from anecdotal experience the chance of being approved is high if you meet all of the requirements. The problem is some requirements are subjective and left up to the judgement of person reviewing your application. If you aren’t successful the first time, I recommend you try again with a new application; taking into account any feedback from the rejection letter.