I don’t, but my sister has not lived in the same state as me since she was 14 and I was 16. I’m not sure why it matters whether it is in a different country or not, except maybe the flight is more expensive? International flights have gone up a a lot, so that would be a definite obstacle. It takes me the same time to get to Mexico as it does to get to NY, and the same time to get to parts of Europe as it does to go to the west coast of the US. Asia is a different story, it takes forever to get there and would make travel very difficult not only for travel time but jet lag time as well. Back when I was a teen and in my 20’s communication was more difficult because long distance phone calls were expensive, forget international, but now that is not much of an issue. I used to talk to my sister about once a week back then, and then finally phone plans were unlimited calling and we talked more like every other day, sometimes for hours, although in spurts there would be a little bit of a despot with less communication and then it would ramp up again.
I see my sister about once a year, sometimes it stretches to once every two years. When my grandmother was getting very sick I saw her two or three times a year for a couple years, because they lived in the same city. Same when my aunt got sick.
Often if the sibling is an expat with a company, the company pays to fly them home periodically. Sometimes they allow the flight to be used for relatives to come see them instead. Especially a spouse not living with them, I don’t know about other family members for sure.
I know quite a few people with siblings living in different countries and they stay in reasonable touch. My husband’s family all live in America, sometimes we live just 20 minutes away, and he and his siblings rarely seem to feel the need to communicate much or see each other. I think it really depends on the particular siblings.