The red dress was her on official mainstream media addressing Commonwealth nations. The other photo is her Offical 2021 Christmas Photo ~ do you see?
Guess who's not long for this world?
https://youtu.be/wnxQxHEeiQ4
The Queen Pays Tribute to her Father in 75th VE Day Anniversary Speech | May 2020
https://youtu.be/xkkZdeAoF9A
The Queen’s Christmas message 2021 - BBC News | Dec 2021