Edited some buildings for accuracy and added some too :)
Hello and welcome to OSM.
We appreciate making changes in a small area. Your's cover 3 continents which makes it difficult for others to verify your edit.
Please take care to avoid changes in such a huge area in a single change set.
welcome to OSM. Toni is completely right but dont let that discourage you: its a common mistake by newcomers. To avoid it simply upload your changes before going to a new location.
I randomely clicked on one of your edits and think this building should be a multipolygon with holes in the middel and those holes have the wrong tag at the moment: https://www.openstreetmap.org/way/817888361
These wiki pages should help you: https://wiki.openstreetmap.org/wiki/Relation:multipolygon
Do you want to try to improve them or should someone do it for you?
corrected the building I mentioned
OpenStreetMap is a map of the world, created by people like you and free to use under an open license.
Hosting is supported by UCL, Bytemark Hosting, and other partners.