So, Grok responded me after having trouble finding a company to pickup the re-licenses to the original grisaia series.

Since Netflix, GKIDS, Diskotek and fandubber Zeeebz who weren't interested on re-licensening and doing the English dub for the series.

So, Grok suggested me with OceanVeil, you know why? Cuz OceanVeil has tons of content filled with "the reason why the series never been dubbed", and that's just a perfect company that'll pickup the re-licenses to the grisaia series and do the English dub, then make a tribute to the fanfare singer.