Will 105 city location pages with ChatGBT cause the 2024 Dec SPAM Google algorithm sweep?

I have a website with over 105 location pages by zipcodes, created and rewritten by ChatGBT with human adjective edits for each city covering the entire United States and Canada. The website had in December, 2024 a high visibility, high organic keywords, and high organic traffic. After December, 26th everything dropped dramatically. There has been extensive backlink work but a second glance into the 1,700 backlinks remaining on this 26 year old Joomla website. I was not sure if the location pages triggered the 75% drop in all areas except the keywords that only fell by 21% or if it's a few overlooked spam backlinks from China or Russia. I already tried to block the entire country in both places but the companies keep using other countries to find a way to take links from the photo cashe.