Using a hopper from a mod such as Tokenable Furnaces doesn't work for the output, the resources get stuck on top of the Extractinator.

So this fix wont be available to use in 1.18.1 modpacks?

Fixed it. The Extractinator should be able to insert into any hopper inventory now. The patch will be available when 1.18.2 comes out.

Probably not. It's not a significant issue, so I don't see a point in creating an entire update for it.

The main issue is that your Extractinator can produce resources so fast that it overwhelms vanilla hoppers, so modded hoppers are necessary or it overflows. A significant issue for automation.

I've decided to make one more 1.18.1 release that fixes this issue.