[Routine Help] Do I have dehydrated skin?

I think my skin is dehydrated but I'm not sure. I have dry sensitive skin that has been flaky, so I have been working on barrier repair. But I've notice that my skin especially my nose gets oily throughout the day. I use Cerave hydrating cleanser and illiyoon moisturizer, I only wash my face at night and rinse in the morning. I don't know much about skincare and tend to try keeping it simple. Is my skin dehydrated and if so what should I do?