I, Joseph R. Biden Jr., do hereby grant a full, complete, and unconditional pardon to all current United States citizens and lawful permanent residents who, on or before the date of this proclamation, committed or were convicted of the offense of simple possession of marijuana, attempted simple possession of marijuana, or use of marijuana, regardless of whether they have been charged with or prosecuted for these offenses on or before the date of this proclamation
This is federal and doesn’t do anything for people on state charges, which is most people.
You can probably safely say “all people.” The federal government doesn’t waste their time prosecuting people for simple possession of marijuana.