CYBT-213043-MESH enables the evaluation of SIG mesh functionality using the EZ-BT Bluetooth 5.0-qualified module CYBT-213043-02 module. And the CYBT-213043-02 module ultimately utilizes the Cypress CYW20819 silicon device.
It is possible to use CYBT-213043-MESH for your research work as well. Mesh application to work as a regular LE or Beacon device as well. But you have to take care few things while combining it, to ensure that the application logic does not interfere/block the normal working of mesh network. I would suggest you to go through the below two responses by VictorZ_46 for a similar query.
CYBT-213043-MESH does not support Zephyr OS.