Dull enamel still safe to use?

I don't see any cracks or chips, but the interior of this dutch oven has become very dull, and some white color comes off if you touch it.

Is it still safe to use? is it repairable?

https://preview.redd.it/jrmpf6zw67ag1.jpg?width=1536&format=pjpg&auto=webp&s=64bfd4b2288d9e0835f16e0064b92ba83873f2f7