for a long time I suspected that you could not get this achievement (I played in beta), so when I uninstalled the beta and I started to play the normal version I proposed to visit all the biomes of the ocean, and I know that if I got it because I used the website "chunkbase" to make sure, I visited all the biomes of the ocean several times and did not give me the achievement, I know it is not a problem of all achievements and I do not think it is only the windows edition because if I could get other achievements, that is the only one I could not get.