If you mean the nasal probe, there is no real alternative for it, I think.
Some of the systems are however more unobtrusive than others. Depending on her need, the diameter of the tubing can be smaller. Also the color of the tubing can be chosen similar to her skin color.
I suspect you mean a nasal probe delivering oxygen. There are many
"missing pieces" from this story. Certainly there is no reason to be embarrassed to require oxygen, however there must be a very severe problem before this kind of supplementation is required.