If you specifically need the , your best bet is to ask in her official Discord community for a legacy file or use the Wayback Machine on her 2021 video links (though downloads rarely get archived).
Find a download link (often found in pinned YouTube comments from community guides like Jaden Plays ).
October 26, 2023 Subject: Market Analysis and Availability of the "Katherine Elizabeth" Minecraft Texture Pack (2021 Context)