The following features have been added to ACNH 2.0.4 from Marcia Johnson's blog

The following features have been added to Animal Crossing: New Horizons 2.0.4 as part of the update:The game has been updated to include fixes for a number of bugs that were previously present in the previous version. Take a look at the shoreline of your island after you've updated New Horizons to the most recent version 2.0.4 update and you'll notice Gyroid fragments. Create a collection of do-buy NMT ACNH-yourself recipes with a holiday theme to share with friends and family during the holiday season.

Some initial thoughts to get you started include the following. You should make ornament wreaths for your friends and family members as you go through the holiday season in order to accumulate the greatest number of ornaments you possibly can. Obtaining Isabelle's Ornament Wreath recipe, which can be used as a template, will give you a distinct advantage.