I have the same problem and I blame social media. I've given up and just reread the page I skimmed through while I was thinking of something else. Sometimes, I'll find the audiobook version and read along but I find myself drifting off anyway. You're right though, it'll probably only get better with practice, most efficiently if you (we) lock yourself in a room for weeks and just read without a phone or computer to distract you or enable you having a short attention span.

Fun fact though, when you read something silently, the muscles in your throat actually articulate the words that you're reading and produce sound that's imperceptible to your ears. But if someone put an amplifier against your throat you'd be able to hear the words that you're "reading silently". Andrew Huberman talks about it in one of his podcasts, I forgot which one.