1Mii B03+ Bluetooth 5.0 Transmitter Receiver

Hello

Just wondering if I could get a bit of assistance. I recently purchase 1Mii B03+ Bluetooth 5.0 Transmitter Receiver to connect to my amp with the hope that I could Bluetooth a connection to my Beats headphone. I have the B03 set in TX mode (transmit) I can create a Bluetooth link as evidenced by the image icon - however when I try to play a record, I get no volume (yup have checked volume). I have added an image to show how the B03 is set up and to verify that a Bluetooth link was created - would anyone have any ideas what the issue is? Would I be correct in the thought that what I want to do is achievable as in from record player to amp to transmitter to headphones?

The RX mode works perfectly I can link to my iPhone and play to Hifi speakers - which leads me to think there might be an issue with the B03?

Thanks