Get support. Consider starting a conversation with other teachers or the child’s family about AI-generated workand the importance of students writing authentically.
For higher education students and especially where its used as a support tool then I think it would be very useful to highlight how they may get the extra support they need. Not everyone cheats because they are lazy, or disorganised. If they get into higher education it's an achievement so to throw it away in this way could highlight deeper issues around support, well being etc.