Do you mean how many nodes in mesh network? Or how many nodes nrf52832 and nrf52840 as a provisoner?
There isn't really a real upper limit of the number of node in your network, the theoretical max number is 32768 nodes.
The only limitation would be the size of flash on the nRF52 for provisioning data.
We don't really recommending using the nRF52 as a provisioner. It's better to store the provisioning data on a PC or mobile phone since you would have more space for the data.
