This app was mentioned in 3 comments, with an average of 1.33 upvotes
This is the app that it's published on. It's not published in any magazine.
It's in Japanese (might be region-locked, I'm not sure), and it's intended for Android and probably iOS devices.
As you'd expect, apps don't reach a large audience of readers, and the Japanese public isn't going to randomly purchase Helck volumes unless they know what they're getting into. Worthy of note is that MangaONE is behind a loose paywall (specifics available upon request), but it won't block people from reading the weekly chapter release.
Nanao makes money whenever a) people click the explicit "support" button to pay her with their "points", or b) they purchase the "Choitashi" (aka Omake) for any chapter, also with their "points".
These two methods, besides buying the volumes, directly support her. Feel free to spread the word, although MangaONE might not be easy to access for foreigners. It's possible to emulate it with BlueStacks, though.
In terms of Helck, it's currently a weekly release, with the occasional week skipped either to take a break or to prepare a volume for release.
Check out "マンガワン-小学館のオリジナル漫画を毎日配信" https://play.google.com/store/apps/details?id=jp.co.comic.mangaone