Is viruses considered living or nonliving?

That is debatable. There are two solid arguments.

Viruses can't reproduce without a host cell. Viruses can't transfer food into energy. They don't create waste. They don't fit the current definition of life.

Viruses can more, reproduce at all, have nuclei. The definition of life was imperfect and needs to be changed because viruses fit many standards.

I personally don't know.