Hi @jahanvi_vyas,
If you use the Deliver based step then I’d suggest you to check their docs / ask it on their (fastlane’s) issue tracker. Our step is just a wrapper around the deliver tool (https://github.com/fastlane/fastlane/tree/master/deliver) so it can only do what the deliver tool does, in a way it requires.
Of course if you’d have any questions just let us know! 