But when I checked my application status on VFS portal there was a message about additional documents required.
And in there is also mentioned that your application is still in process. What that means?
Based on the date you submitted your application Feb 20, which is less than a month ago, i believe you havent yet received biometric and medical request letters; I am guessing you have included your actual passport in the original application package. If this is a case, you are not supposed to as you are only asked to submit a photocopy of it. Your physical passport was sent back to you as it is not required at this stage. In process simply means your application has been received and still under reviewed. Check the message to see what additional docs they are asking for and follow their instructions on how to submit additional docs...