My favorite earplugs are Loop Quiet because foam earplugs make my ears sweaty and itchy. If foam earplugs work for you they can’t be beaten as far as noise reduction.
I sleep on my side so I wear the headphones backwards and position the bottom one so it’s not between my head and pillow.
I turn on the iOS background sounds dark noise and put on an audiobook to distract from my mind not turning off. Add in an eye mask and I sleep quite well.
Any particular questions, happy to answer.
Everything sound-related is always messy in many ways. I bet when we get high quality replacement digital ears you can mute, these will still have some stupid crap going on, like unstable device pairing.
https://www.soundcore.com/uk/products/sleep-a20-sleeping-ear...
I haven't tried them myself, but they come highly recommended.