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با طراحی فهرستی از سوالات، مجموعه ای از سوالات قطعی و از پیش طراحی شده را در اختیار خواهید داشت

In the context you provided, "come off as scripted and forced" means that when someone delivers a set of questions in a manner that seems rehearsed and lacking genuine spontaneity, it gives the impression that the questions were not asked naturally or authentically. Instead, they sound like they were preplanned and delivered mechanically, without considering the context or the flow of the conversation.

For this reason, although از پیش نوشته‌شده is also a correct translation, I suggested "ماشینی و مصنوعی به نظر رسیدن" as a translation for the whole phrase.

Here, "forced" means something like this (quoting from Collins Dictionary):

If you describe something as forced, you mean it does not happen naturally and easily.
...a forced smile.
She called him darling. It sounded so forced.

https://www.collinsdictionary.com/dictionary/english/forced [def. 3]

The key word in this definition is "does not happen naturally". We can translate it to "مصنوعی", I think (interestingly, مصنوعی is the opposite of طبیعی [natural] in Persian).