Creating a photo with a blurred background image is one of the most popular photography techniques. Unfortunately, the depth of field capabilities of the camera phones are not as sophisticated as those in DSLR cameras, Mirrorless, or pocket cameras, making it a bit difficult to create these blur effects.
For that reason, you should take unfiltered pictures, then edit the image with the Photo Editor application on your phone which usually also have a wide selection of filter editor in it.
You are welcome.