Hey dude, similar experience here.

I grew up a minority, and went to study abroad where my ethnicity is the majority, then stayed for work. People would assume I'm local by my appearance, and as long as I don't have to speak, I'm blending in. I visit home quite often, once in one or two years, but every time, the feeling of being an outsider grows. I haven't been contacting most of my friends for a while, and my personal values have changed. As you said, parents are ageing, streets are different, and the empty lots I used to play in have been built.

Even though I said I feel more welcome in my current residence, being a foreigner means some landlords don't let me rent their apartment, and some banking services aren't open for me. Can't buy properties either.

I feel like an outsider anywhere I go, and I come from a country with stupidly weak passport. Can't have multiple nationalities either.

But I'll visit home often, and spend more time with my family. Time flies and things change too quickly, it'll be good to celebrate what little we have.