Hello Felix
The first thing that comes to mind is that since the directly connected port channel interface subnet does not show up in the routing table as a connected route, the port channel interface must be down. Do a show ip interface brief to check the state of the portchannel interface and if it has successfully obtained its IP address . If not, try doing a no shutdown on the interface.
The subnets of the IP addresses assigned to interfaces MUST show up in the routing table if the interface is active and has been configured corrrectly.
I hope this has been hepful!
Laz