The phrase "separate continents" means that there is a large distance or body of water that divides two land masses or continents from each other. Full definition
Just a few years ago, we were living on separate continents, seeking a life partner without any success. (mypartnerforever.net)
Massive oceans physically separate the continent from other regions in the world by great distances. (mauldineconomics.com)
The first time I was pregnant, a natural disaster caused my husband and me to end up on separate continents unsure of when we'd see each other next. (modernlovelongdistance.com)