No, Crown Store and other parts of the game like the character selection (pre game) are protected and thus addons cannot change anything here.
Like the sticky thread in this subforum, with the name "Please read BEFORE requesting addons/updates/features/creating addons", already tells you at the sub headline "What addons cannot do", point 1. :-)
https://www.esoui.com/forums/showthread.php?t=9865