If you knew your partner would be interested I think it's appropriate to share.
Relationships work by meeting your partners needs and its often the small stuff that consolidates a relationship. Op is obviously interested in her neighbours and if her partner shared the info (since at a low cost to him) it would have shown he is interested in her.
Sometimes I hear things which I don't find particularly significant, it might be something which is a bit sad or that someone has done something which has no direct impact on me or my family.
There's no deliberate withholding of information and if it came up in conversation I would mention it but I'm more likely to forget about it as soon as I'm told than feel any need to volunteer the information to others.
My dh is like that. Its more he forgets to tell me. Maybe a friend tells him their dd is in hospital and he never mentions it. Im upset then as dont inquire after little one. Nothing sinister just forgetful.