My maternal grandmother had a favorite. Whoever (my mom or my aunt) was the favorite at the time was the one who my GM basically left everything to in her will. And she (GM) would regularly talk about it. When the favorite would do or say something to tick her off (which happens between parents and adult children sometimes!), she would talk to the non-favorite daughter about how she was going to change her will to leave everything to the non-favorite kid.
As a result, it bred an incredible amount of resentment between her 2 kids. After my GM died, they only spoke to each other through lawyers and ended up suing each other. It was a mess. They both ended up mad at me at various times throughout it all because I refused to take sides.
My GM was demanding. Expected her 2 children to just somehow "know" what she wanted, needed, etc. Yes, she really did expect them to anticipate her needs and somehow know what she wanted without her having to speak up for herself. She'd never flat out ask directly for anything. It was a lot of passive-aggressive manipulative hinting and other games.
Because of her lifetime of playing favorites between her 2 kids, she basically ruined any hope of her 2 kids getting along. Ever. There was so much triangulation there, it was crazy. My mom never saw it.
In her old age after my GF died, my GM went through a long phase for a long time of floating back and forth between living near my mom and then moving to live near my aunt. Whoever she lived closer to (i.e., on other sides of the country) was based on who was the favorite at the time. And then, invariably, something would happen...the wind would blow the wrong direction...and my GM would get mad or would think suddenly that she wasn't "needed" anymore and then the other kid would move into The Favorite position.
It was all totally messed up and very toxic.
Both my mom and my aunt spent decades knocking themselves out in order to win her approval on various things. Both my mom and my aunt also took turns having moments where they'd had enough and would say, "Enough, Mom! Enough of the games!" And then GM would move to be closer to the New Favorite.
My GM expected a lot of things from her adult children. But she wouldn't actually TELL them what she expected of them. So they had to guess and figure it out.
So I'm going to end this long post with this thought:
If you (the proverbial "you," not any of you here on this thread in particular) are dissatisfied with the relationship that you have with your adult child(ren), there is SOME sort of reason why. Maybe the problem is with you and your expectations. Maybe the problem is you want one thing, but you say that you want something else. Maybe the problem is with your kid...maybe your adult child is busy, not available right now where they are in THEIR life to give you what you need/want from them at this point in YOUR life...maybe your adult child is going through a phase. Maybe your adult kid is just a self-absorbed butthole. Or maybe it's a combination of factors.
If any of that applies, then you can only change YOUR thoughts, YOUR choices, YOUR actions. You need to decide what YOUR boundaries are. You need to clearly communicate what you want and be direct about it and not play head games or word games. And you might also need to be realistic in what your adult child might or might not be able to give back right now in the relationship.
And, if needed, go talk to a therapist about it to get some help in sorting some of it out.
Or don't. That is a choice as well. You can do what my GM did and stew about it, play head games, and basically make your kids miserable for years...to the point where it felt to them like spending time with her was more of a chore than an enjoyable experience.
You can choose to be a martyr or a victim about it or you can choose to take charge of your own life and your own choices. Whether or not the adult child meets you halfway and is agreeable to working on the issue(s) with you is not something that's up to you.