Some changes are not on OSM

Yesterday, I made a lot of changes in my area, but some of them are not on OSM. Why does this happen?

Changes happen immediately in the database. It may take minutes to hours for the rendering to update, though I have seen a day or so when there was a major change in the rendering style that caused the servers to try to re-render the whole world. And different zoom levels may refresh a different rates.

And it may take forever for you computer’s browser cache to update. At least that one you can control by forcing it to refresh its data.