Yes. You can connect a vinyl player to the AUX In port on the WiiM Mini and play audio through the speakers connected to the WiiM Mini.
In addition, you can create a multi-room audio group using the WiiM Mini together with other WiiM devices. Once grouped, audio from the vinyl player can be streamed and played simultaneously across all selected WiiM devices in your home.
For detailed instructions, see How to Use Audio Input Port of the WiiM Mini.