Spotify Connect from multiple devices

[olb100618]

My husband uses Spotify connect and is able to play music on our Alexa speakers from Spotify while listening to another video from his phone. I tried to use connect from my iPhone XR last night by going through the steps online. “Select a song, press play, click the TV/iPod icon at the bottom of the screen and select a device to play it from and wa-la!” Only my TV comes up as an option (with 4 Alexa devices in pairing mode around my house). And even when it is connected to a device, it’s through Bluetooth and not WiFi, like connect, and I still can only play all audio through Bluetooth… meaning if I want to play music on my phone and listen to my baby monitor through my phone, all the sound goes to the speaker and I have music mixed with baby noises playing loudly through the house. My husband, his brother and I share a Spotify premium family plan, is only one device able to use Spotify connect? Thank you for help on this very irritating issue!