Help please

I was super against CIO with #1 but inadvertently did it with #2 over a long weekend solo parenting. #2 now settles a lot quicker than #1 did at this age. I put her down awake and leave the room and she's asleep in 5 mins after crying and fussing. Her naps are also great compared with his BUT he's a different child, has eczema so has different needs but I was rocking him to sleep until about 18 months for naps.

I did a really responsive and gentle sleep training where I stayed in the room with him and lay down next to the cot with my hand through the bars and "went to sleep" when this was ok (he was never super ok but fussed and wasn't crying) I took my hand away then inched towards the door. Once at the door I put down and left, I didn't do the stage of sitting outside the door with the door open but that's because he needed it DARK to sleep. If he cried I just picked him up for cuddle and then resumed once he was calm. Not going to lie, took MONTHS of dedication this way.

He has only just started sleeping through the night and we never sleep trained these wakes as 90% of them were eczema related as you could watch him scratching himself in his sleep. We would just go in and hold him until we could put him down asleep and if that didn't work we just brought him in with us.

I'm sorry you're going through this. There's a really good subreddit called biologically normal infant sleep that doesn't support sleep training where you may find advice, often parents post about similar issues xx https://www.reddit.com/r/bninfantsleep/