iwtl how to focus without getting distracted every few minutes

I feel like I’ve lost the ability to just sit with a task. Even when I’m interested, I start feeling physically restless after about five minutes.. check my phone, I need to get a snack, or fix the lighting, or check the weather. It’s like I’m looking for any excuse to break the focus because staying in it feels weirdly uncomfortable. Has anyone successfully gone from having a goldfish attention span to actually being able to focus for an hour straight?