Upcoming Optum interview, help!!!

I have an interview coming up for AI/ML Engineer in Optum for grade 26. My expertise is mostly in RAG pipelines and chatbots/voicebots, etc. though I have done some classic ML projects. What kind of questions can I expect?

What level of DSA do they ask? Will I be asked System Design for SG26? How deep will they go in the projects?

Has anyone from Optum or anyone who interviewed can give some advice?