ayo is there a zach route?
Not yet. From what I understand It is expected that Zach, Chris, and Russel will have routes implemented once the main 3's routes are either finished or completed to a degree that the team will feel comfortable adding more routes to the VN.
However, the team has added options so that implementing their routes will be easier once they're ready to do so.
Edit: Just found out that while the Chris and Russel routes have had their Patreon goals reached, Zach hasn't yet. It is likely that it will in the future though, but we'll just need to see.