I have had the exact same problem with my Note 10 and my s23 ultra phones whatever Power Amp is doing to cast has not worked on any device that I've installed it I cannot Chromecast to anything It prepares to be chromecasting when I change the volume on my Chromecast volume noise happens as if the phone is controlling the Chromecast there is no music coming out of any of my speakers this is a power amp issue and it did not happen when I first installed power amp 3 or 4 years ago. It appears like you have not debugged your software could one of you install it on an s23 Ultra or any Samsung device and see if you can get your power amp software to Chromecast because I don't think you'll be able to thank you
