This is not an default option in the deeplink module, maybe it’s an option for you to perform the action in 2 steps:
- Create a unique identifier and send a post request to the other server containing the data that you need to send? Making sure the data is available on App2
- Then send the deeplink with the identifier as query parameter and handle the retrieve with the deeplink MF
Or change the deeplink request handler and create a redirect method that allows for catching and sending the http headers respectively.