BLE Mesh heartbeat messages in static provisioning

 Hi.

Not sure what your problem is specifically.

We don't have an example for the latest version of the nRF5 SDK. We do have one from an older version:
Ref https://devzone.nordicsemi.com/f/nordic-q-a/39270/ble-mesh-heartbeat-example

What you can do is to try run the example with the correct SDK version. After that you can compare the modifications made and find out what I added. Then you can implement similar modification to SDK v5.

Br,
Joakim