Hey @hammadzz
I am not from Freshworks, but did you try to reach out to the support team (support@freshdesk.com)?
If it is something to be activated like beta-stuff or other things, I usually reach out to them.
The non-modal-backdrop feature is kind of a different story, as being heavily related to app dev, but they are usually fast in replying.
Another option is to ask @Freddy who is able to enroll one in the Non-Modal-Backdrop beta.
Best
Tom