The official patch notes for this version are characteristically brief, stating simply that Nintendo has "".
: Dataminers found two new sprites related to the SMB2 Mushroom (the "pole" move) within the Ninji Speedrun files, suggesting minor internal asset management. Context for NSP Users Super Mario Maker 2 -NSP- -Actualizacion 3.0.3-...
Nintendo's only official note was "Made adjustments to make for a more pleasant gaming experience". Technical Changes: Dataminers found no new content The official patch notes for this version are
: Refinements have been made to the Course World search filters, making it easier to sort by upload date and play counts. and sharing them violates policies.
— they’re often malicious, and sharing them violates policies.