iPhone mirroring unable to connect to iPhone from iMac

I open iPhone Mirroring on my iMac, click continue, it says unlock iPhone, my iPhone pops the unlock screen, I unlock my phone, then on my iMac it says "unable to connect to iPhone". Both devices have Bluetooth enabled, and are on the same wifi network. iMac is running Sequoia 15.0, iPhone 15 Pro is running iOS 18

Thoughts?