What exactly constitutes as ‘independent’ sleep? How ‘independent’ are your LOs?

I haven’t used any fancy sleep training books or programmes and I have just done what felt right/natural to ‘sleep train’ my son.

I’m wondering what is classed as an independent sleeper?

For naps I put my son down in his cot and leave the room. Most of the time he’ll fuss for 10 or so minutes but drop off by himself. Sometimes I have to go back in and hold him (without actually picking him up) and hush him to calm him down. Other times he won’t settle so I nurse him but this only happens very occasionally.

When he’s asleep he’ll sometimes wake up. Lots of the time he’ll get himself back to sleep with no issues. Sometimes I have to settle him.

Tonight I put him down for the night and he was fine. He started fussing after he couldn’t get himself to sleep. I went up to calm him down and held his hands and hushed him but left the room again while he was still awake. He nodded off after that, by himself.

Would this be considered an independent sleeper? How do your LOs fair at getting themselves to sleep?