The fireworks carefully prepared by Fred and George certainly succeeded in distracting everyone, temporarily making people forget that Death Eaters had just tried to launch a sneak attack.
However, not long after the fireworks ended, Harry's wedding was brought to an early close.
Because no one could guarantee whether the Death Eaters would strike again in the middle of the night, especially right after having just been ambushed, nobody was willing to take the risk. After Sirius Black announced the conclusion of the wedding, the guests left Avalon in an orderly fashion under the evacuation of the Aurors.
Chapter 1447