Disable iOS Safari lock screen scrubber for media

DISABLE Player on lock screen completely

if you want to completely remove the lock screen player you could do something like

const a = new Audio();
document.querySelector('button').addEventListener('click', (e) => {
  a.src = 'http://sprott.physics.wisc.edu/wop/sounds/Bicycle%20Race-Full.m4a' 
  a.play();
});

document.addEventListener('visibilitychange', () => {
  if (document.hidden) a.src = undefined
})

https://jsfiddle.net/5s8c9eL0/3/

that is stoping the player when changing tab or locking screen (code to be cleaned improved depending on your needs)

From my understanding you can't block/hide the scrubbing commands unless you can tag the audio as a live stream. That being said, you can use js to refuse scrubbing server-side. Reference the answer here. Although that answer speaks of video, it also works with audio.

I did a search, in search of a way to help you, but I did not find an effective way to disable the commands, however, I found a way to customize them, it may help you, follow the apple tutorial link

I think what's left to do now is wait, see if ios 13 will bring some option that will do what you want.