The exact date the three-night event special was filmed is unknown, but it did take place before his death on October 24, 2022.
The show follows Leslie, Robin, Cheryl, and Finesse as they team up with former LEGO Masters contestants to spread holiday cheer by competing in challenges to win $10,000 for a charity of their choice.
Source: https://www.distractify.com/p/when-was-lego-masters-holiday-special-filmed