Unable to get MAVLINK 2 downlink in TBS crossfire nano in Matek H743mini

Hi, I am trying to build a quad using TBS crossfire nano RX. I have binded this with micro-TX v2. In output of the Crossfire nano, I have set channel 3 and 4 as Mavlink RX and TX respectively which is connected to TX7 and RX7 (Serial 1) of FC respectively. channel 1 and 2 of receiver is connected to RX6 & TX6 (serial 7).
I have set SERIAL1_PROTOCOL = 2 and SERIAL1_BAUD = 115.
In radio controller side I selected the TBS Wi-Fi module and connected it to my mobile hotspot. and in this WIFI modules MAVLINK settings I tried with both UDP and TCP. I connected my laptop to tbs crossfire Wi-Fi module and in mission planner I tried to connect with both UDP and TCP by entering correct IP address and port no. But I could never receive the heartbeats.
I checked in my radio controller there in WIFI modules mavlink setting I am able to see UPLINK but in DOWNLINK it shows none.

Any help from the community is appreciated!.