Navigate to Background and Filters and tap the Blur option. You can give this alternative method a try or use a new tool.
 
 

Can you blur background in zoom before meeting – none:. How to blur your background on Zoom

 
Lastly, if you don’t have your own images or videos for use as a virtual background, you can use nothing and just blur the background. The Virtual Background feature allows you to display an image or video as your background during a Zoom meeting, which can provide you with more privacy or.