Yes. If you're ever talking to someone one on one and they're not paying attention find a way to address it.

It wasn't an interview but when I was first starting my engineering career I was in a little three-way meeting with my manager and the department director in a tiny break-out room presenting some automation I'd developed to save time provisioning DC infrastructure.

The director was not paying attention at all and was pecking at their iPad. iPads had just come out and every VP/director was carrying them around and chicken-pecking them during meetings.

I stopped presenting and said I would wait until they weren't busy anymore ;D Was a bit irritated as they were the entire reason we were in that room.. Luckily I had quite a bit more tenure than that director haha(and a lot of political cover).

Absolutely. It can be quite painful in the short term, but the long term benefits (both for you and that particular relationship) can be huge, especially if you're naturally averse to confrontation.

Remember that interviews are two-way.

If they’re already not paying attention, what’s left to lose?