I don't have the option of importing my own music on my Huawei Mate 20 pro. My friend has a button called " add your own music from this device". I can't find any answers on any other website. I have a screenshot from my friends phone. I would do it with computer. But I don't have one here at the moment.
At Spotify, we’re often testing and launching improvements and new features. When we’re testing, you may see something on the app your friend doesn’t, or get a new feature for only a temporary period. Let us know what you think over at the Ideas Exchange.