Hello @gumaro 

Yes.

Archer C80 supports WDS Bridging or Range Extender Mode, you can configure it accordingly to connect it to the host wireless router.

You can follow this FAQ to configure WDS bridging on it. If there is no WDS Bridging, try to find and enable Range Extender Mode on it.

If the host router supports EasyMesh also, you could build a mesh network by using EasyMesh. To get more details about EasyMesh, please check this thread.