
Hey Roland,
First, check that you have iOS 14.3; there was a Bluetooth issue with 14.2.
Second, ensure that you have it connected through the WeDJ app itself, not the phone's Bluetooth settings.
Third, check that the audio settings in the app are configured properly for the split output and that you have a MFI-certified (made for iOS) lightning-to-minijack adapter connected with the audio splitter connected.
If you're still having problems, let us know what is working and what's not, how you have things connected.