Minecraft wiki entry for Defeating_a_monument, associated text: In Bedrock Edition, the seed picker includes a world called "Ocean Monuments Ahead", which has multiple monuments reasonably close to the spawn point. In fact, you can easily see one of the monuments from the northeastern shore of the small island on which you spawn.
In Java Edition, three simple seeds spawn you close to an ocean monument in 1.17: 101 (the closest), 400, and 555555.