The standard processing time of the Vietnam e-visa is 3 to 5 business days. Sometimes, it’s earlier than that, but there are also times that the processing will be delayed especially if you’re applying during the peak travel season.
There are 2 options to get your e-visa extended as below:
Find a reliable travel agency offers visa extension and bring your passport + Temporary residence declaration (it cheaper if you have this document), they will take care the rest to get your visa extended. Rush service is available.
When applying for the Vietnam e-visa, you will be asked to enter your personal information. This includes your complete name, date of birth, nationality, and some relevant details from your passport.