Hello and welcome to OpenStreetMap!
You've used "wetland=island" here - I'm not sure what that means?
You can see what values tend to be used with "wetland" in the UK at https://taginfo.geofabrik.de/europe:united-kingdom/keys/wetland#values and internationally at https://taginfo.openstreetmap.org/keys/wetland#values .
You also might want to think about drawing it as an area rather than a point, so that anything processing the data has a bit more of an idea how big it is.
Best Regards,
Andy
PS: Any questions - please don't hesitate to ask!
