I think I'm going to echo some advice already given but from a slightly different perspective. We are very reading focused in our house. It's a big part of dp and I's life and Ds1. We have always taught extra to school , partly because the school isn't the greatest at teaching (great at other things though ) and ds2 hasn't had the greatest teacher in the last year.
Ds2 was far less interested. We started the same as we did for ds1 but he saw it as a chore. We quickly realised this then meant because he didn't like it at home he stopped engaging a bit at nursery then school. I got it wrong. Not a problem we changed tack.
We didn't push at all. We just accepted for a bit he was more creative and arty and fostered that. We figured he would get there and we would push a bit more when it was actually necessary.
We had to be really careful not to make it a chore again. No guilt , no comparison. The only thing we did do is not read things for him. (We didn't just leaving him hanging we got him to figure it out from context clues via pictures etc).
What we didn't do is read things out to him. Say he wanted to use the computer but needed to read an instruction. Rather than read it out to him we worked out if there was a button he needed to press (say there was an obvious green button). He started to realise that to do the things he wanted to do he would have to learn how to read.
It stopped being about arbitrary learning, and it became about learning something because he realised he needed the skill. He realised that without reading he would have to wait for one of us to be available and it took longer.
So he started to try. We gently helped him by sounding words out. If he wanted something typed in. We wrote it down and he copied it.
If he wanted a toy and to work out what was in it , we would draw a picture related the word then the word and ask him what he thought.
He is now asking me to do phonics and reading with him to practice daily during the summer because he's excited about reading better.
He doesn't want to read , he does want to find out if the dragon really did steal the princess etc.
Now he is full on invested. However for ds2 there is no pleasure in just reading. It has to get him something he wants. Part of that was withdrawing our help so he realised that connection.
I would say be careful of using guilt tripping like "don't annoy me I'm tired " that doesn't embed the desire to do anything for themselves so as soon as you aren't in control they will stop.
Dp and I teach adults and you learn really quickly that learning for the sake of it is not a good motivator (and quite patronising when dealing with adults which is why we don't use it ) Learning because you need that skill to get something else is far more sustainable.
There is always a way to point out why they need a skill. Learning for the sake of it is purely for those who enjoy it , which is not a morale issue. It doesn't make anyone better that they enjoy learning.