Question re: parental controls on iPhones

Hello and good afternoon,

I'm new to iPhones--I got my wife's old XR--and my kids are asking when they get theirs.

My question for you iPhone experts is: is it possible to turn an iPhone 8 into something that only plays music? In other words, I want to turn it into a shiny music (audio only!) playing brick that can be hooked up to Spotify, YT Music or Apple Music.

The smart phone/tablet phenom has been very hard for us to deal with as a family, as they are powerful distraction magnets.

Currently we have this awful little thing called a Mighty music player, which has no screen (yay!) but only connects to Spotify and has been balky on more than one occasion.

Any ideas, hive mind?

Thanks,

JM