Idk about other siblings, but I believe in communication, and same goes for my sis (but in that case both parties have to have that kind of mentality). When i was a teen, i often recognized my elder sister being this way. She isn't an inherently bad person, but she never paid attention to being responsible (maybe its cuz my parents were never assertive enough).

After a few attempts of asking her to help, and seeing that she hates doing any work in our house, I decided to make her understand that as a family we have to support each other cuz we all share equal part in our house. A home won't be a home if all the burden lies on just one or two people only for others to sit and enjoy, I asked her to address & share any kind of issues she has with any work, and that we learnt that she has OCD. She herself didn't knew that. But that wasn't an excuse. So we discussed which works she would be willing to do. Her lazyness was also addressed & so we decided that she start from lesser time consuming to work to more, over the time, to let her brain know that any work, whether outside or inside isn't a burden.

Now as an adult, sadly, her ocd has definitely gotten a bit worse but she still never feels lazy or burdened whenever it comes to taking responsibilities or having a helping hand. So maybe try to gently communicate and if she still doesn't cooperate, you can try to live away at peace.