I have a Zoom interview for Iowa upcoming, and they send a list of questions to prepare beforehand. The interview is scheduled to be about 20 minutes, so I'm not sure if all of the questions will be asked.
Funding was a big factor to my list of schools I applied to as well, but in any interview, I prioritize speaking about what I hope to learn in the program, what I want to research while I'm there, or what I admire about the school, facilities, or faculty/other grad students. Focus on the art and your goals first and foremost. In my experience from job interviews and interviews for undergrad scholarships, I have found that it's okay to say you appreciate the financial support a program offers after you've explained why you're a good fit and such. "This is an ideal program for me, so I was excited to see that there are opportunities for fellowships and TA positions that can financially support me as well." Tack it on at the end.
IMO, it feels unnatural to just walk into an interview and pretend I'm rich enough that money is no object! I also openly state that I'm from a low-income background in my personal statements. So I make my financial needs take a backseat as a quick acknowledgement, one of many factors that encouraged me to apply to [Insert School].