yes, she's using AI for the background
Some of their faces are clearly AI tho. Some, not all. The close up ones don't seem to be AI.
I believe the characters are not AI, You can tell what's AI and not. I believe the characters are hand drawn, but the background is AI. She didn't used to do that in the previous chapters, this is all new. everything was drawn in the old previous chapters, and she did beautiful backgrounds. I don't know why she started adding AI to it. I think to speed up the process.
Feels like some panels are made with AI.. It's not as polished as it used to be.. maybe it's just me tho