How to recover old data that has been vandalized

if it’s not vandalism then what do you call it, he removed several buildings that existed without explanation, yet I live in the same city

you can check on the map of google maps or mapbox where esri the buildings have existed for several years, and this person has deleted a 10-year-old job

how to become a moderator of changes made by a region

I’d suggest you report it to the DWG, but you’ve already done that, and just 5 minutes ago a DWG person has reverted some of the changes. See also this block.

I’d also suggest commenting on their changesets. No-one has done that since 2022.

vandalisme;several buildings have been removed

can we know where the person who is doing the vandalism comes from, (example the country)?