I only spoke about buying a home with my friends who already owned a home, and I didn't speak about it that much, TBH. I'm very careful not to talk about home ownership things with the friends of mine who I know don't own, especially when the reason is that they can't afford it. It's a really contentious issue here in London.
It's a big life event, but it's typically not one that makes your life worse, so it's not one where I would expect my friends to put their own feelings aside and support me.
I'm sure plenty of people assume I've bought with family money and I'm sure plenty of people are at least a tiny bit jealous. Honestly, if our finances were reversed, I'm sure I'd feel a little bit like that too. But I've made huge sacrifices that most people don't realise, and it wouldn't make them feel better if I explained. And on top of those sacrifices, there is also some privilege, and that definitely wouldn't make people feel better either. I like my friends. I don't want to make them feel bad!
If a friend who didn't own asked me things outright, I would tell them. But I think it would be incredibly insensitive to bring up this sort of thing unprompted. Instead, I sympathise with them, and I trade funny/frustrating stories from when I was renting.
Talking about home ownership is like talking about religion. You just don't, unless you're very sure the other person shares the same circumstances as you.