At the point that a device is joined to the ZHA network, if it is a ZLL device, then it is supposed to fall back to a ZHA profile (often on a different endpoint) and then join as ZHA device.
I’m not sure exactly what you mean by “master” and “slave” in this context – – those are not zigbee terms.
Zigbee has coordinators ( there will be only one of these on a ZHA network, in this case the smartthings hub), routers (repeaters) and end devices.
Every end device chooses a router as its parent when it joins the network or after a zigbee heal. So we also talk about zigbee parent and child devices, but it has a completely different meaning than the way smartthings uses the terms.
If you are asking if a ZHA repeater can act as a ZLL device, again, no, not using the ZHA profile. ZHA Devices do not join ZLL networks for security reasons. But the same physical device might also have an endpoint with a ZLL profile, and then its attributes just depend on that new profile, they aren’t in any way shaped by the ZHA profile. Two separate networks.