OTA programming

Hi,

We are using smartbond tiny module (DA14531MOD-00F01002) in our application.

The thing is we have connected SWD pins from the module as shown in attachment, for debugging & development of software.

We had connected UART with flow control to our microcontroller as a host interface to module.

Since these pins are not accessible when assembled as a unit, How to proceed with Over The Air programming of the module (OTA) for first time ?

Also how to update the firmware for subsequent updates using OTA ?

Appreciate your help at the earliest !!