Okay, quick confession: I went down a small rabbit hole trying to pin this down for you. The tricky part is that titles like 'In Your Wake' can refer to multiple works across languages and formats (webcomic, manga, novel, or even a fujoshi short), and release dates depend on what you mean by "first release" — first chapter on a hosting site, first official compiled volume, or the first fan-translation drop. I couldn't locate a single universally accepted date in the sources I checked without knowing the author or platform, so here's how I break it down when I want a precise date.
If you mean the very first time any chapter was published, check the original host: that could be a webtoon site, the author's blog, Pixiv, or a publisher's online platform. If you're asking about the first official print or English volume, that information usually shows up on publisher pages, ISBN entries, or retailer listings like Amazon and Book Depository. Fan translations complicate things because scanlation groups sometimes release chapters long before official translations, and those dates are separate and often undocumented in mainstream databases.
My go-to is to look at the author's social media (Twitter/X, Instagram), the publisher's release announcements, and aggregator sites like MangaUpdates or MyAnimeList, which list initial publication dates and serialization info. If you can tell me the author or the platform where you saw 'In Your Wake,' I can narrow it down to an exact day. Otherwise, start with those sources and you’ll usually find either the chapter 1 publication date or the ISBN/print release date pretty quickly.