Internal Nextjs URLs

[vespaiach]

When I name my routes with underscores, next-sitemap won't generate sitemap links for those routes (for example: /__all/categories), because in the body of function isNextInternalUrl there is a regex that will filter out all routes started with underscores.

next-sitemap/packages/next-sitemap/src/utils/url.ts

Line 19 in 3bdd0b2

return new RegExp(/[^/]*^.[_]|^\/(404|500)$|\/_middleware$|(?:\[)/g).test(

I just want to ask whether those underscore routes are NextJs internal URLs or not? because I couldn't find any document about that on Next.js website.