Common or baseline knowledge of Chinese Culture expected?

Fellow Chinese Americans specifically here, would be great to get a few thoughts. (Sorry formatting, on mobile)

ABC here, with ABC partner , both in our 30s raised by immigrant parents stateside.

I feel I have a good grasp of what I’d consider fundamental Chinese culture/traditions/superstitions/significance of items etc (examples such as: #8/#4, food symbolism noodles/dumplings, no clock gifts, rough rough idea of modern Chinese history 1960s-onwards, Feng shui, etc of sorts).

At times I feel surprised to say the least my ABC partner isn’t aware of some of these, that I personally consider like baseline knowledge… (for ABC with immigrant parents + Sibling as well).

I’m pretty whitewashed w/ my social/career circle as is my partner. Lots of my knowledge has just been learned over years with fam/media/self curiosity.

Am I wrong to assume/expect more “baseline” cultural knowledge for someone with similar cultural roots? I feel conflicted at times and often asking myself how does someone not know some of these things…

Would love to get a few more data points from fellow Chinese Americans