You can listen to it, but you need to insert it and save it. The specific steps are as follows:

The insertion of background music cannot be played directly. Similar hyperlinks need to be clicked to jump to open playback.

First, you need to select a text, click Insert---Insert attachment---Select background music and click OK. Then click on the attachment and click to open it to play.

MP3 and wav audio files can be directly inserted into WPS PPT. And it can play normally when playing the slideshow.