The phrase "few more days" means a limited number of additional days. It is an idiomatic expression used to indicate that something will take place or be completed within a short period of time.
Usage examples
I need a few more days to complete the project.
The deadline has been extended by a few more days.
Can you wait for a few more days before making a decision?
The product will be available in stores in a few more days.
She will be back from her trip in a few more days.
The repairs on your car will take a few more days to complete.
I'll be on vacation for a few more days.
Please keep the item on hold for a few more days until I can pick it up.
The sale will last for a few more days, so don't miss out!
The weather forecast suggests that it will rain for a few more days.