I have bought humankind pre order on epic games and i can't get it on g2g.

If someone know how to get humnakind conected to g2g please tell me.

:)

Not completely sure about Epic, but in Steam you:

1. Open Humankind.
2. Click the Extras button, and select Community in the pop-out menu.
3. Click the Connect to G2G button.
4. Enter your G2G login and click OK.

Then you should see any personas you have collected.  Note that Humankind will log you out automatically from time to time so try logging in again if you notice that your content suddenly goes missing.