Most asked question in my PMs by a distance: how fast do these index?
Honest answer first. Nobody can tell you, and anyone who hands you a number is guessing. Google's own documentation is blunt about it:
"In general, we cannot make predictions or guarantees about when or if your URLs will be crawled or indexed."
They say the same thing again elsewhere, that indexing is not guaranteed even for a page following every rule they publish. I am not going to pretend I have a workaround, because I do not, and neither does anyone selling you one.
What actually moves it is the boring stuff. Does the article genuinely fit the site's niche, is it worth reading, does Google decide it wants the page. Same as anything else you publish.
But here is why it is slightly the wrong question, and this is worth understanding before you buy a link anywhere.
What matters for your link is not whether the article's own URL gets indexed. It is whether the page carrying the link gets crawled. On a homepage placement those are two different pages. Your link sits inside an article that runs on the homepage. So even if that article's own permalink never gets indexed at all, the link is still sitting on the homepage, and the homepage is the most crawled URL on any site. Google again:
"URLs that are more popular on the Internet tend to be crawled more often to keep them fresher in our systems."
Compare that to a link dropped on a fresh deep post, four clicks from the homepage of a site nobody visits. That page has to get discovered, then crawled, then kept, before your link does anything at all. That is the bet most people are making without realising it.
Still not a guarantee and I will not dress it up as one. Google indexes what Google wants. You are just not depending on a brand new deep URL getting noticed first.
The editable part then handles the rest. Once GSC shows you which query the page is actually earning impressions for, you swing the anchor onto it instead of buying another link.