I found some documentation in Xilinx for developing FreeRTOS projects in Vitis, along with instructions for loading FreeRTOS+TCP, which may be what you’re looking for!
Main Xilinx page for FreeRTOS project in Vitis: https://xilinx-wiki.atlassian.net/wiki/spaces/A/pages/18842141/FreeRTOS
Child page for instructions on adding FreeRTOS+TCP to a FreeRTOS project: https://xilinx-wiki.atlassian.net/wiki/spaces/A/pages/18842001/ZC702+FreeRTOS+TCP