how to config the mesh network to make all nodes have relay function

i am using nRF52832 with Mesh3.0.0, i want to build a network like a chain,Client1 to Server2 to Server3 and Server4 with interval about 40 meters, however i tested with light client and light server, found it doesn't work, any configuration for those node? or how to config this network by nRF mesh APP from mobile phone.

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