ScholarOne Manuscripts Ideas is a community forum for clients to engage with each other and with the ScholarOne Product team around ways to improve the platform experience. Ideas submitted in this forum are useful in surfacing themes and items of critical importance to our users, prioritizing roadmap initiatives, and fine-tuning feature development.
The option to change a revision due date appears on the decisioned manuscript until a draft is created, then it shows for the draft and not the decisioned manuscript.
However, the editor will usually go to the decisioned manuscript first to make a change to the deadline in either case, so it makes sense to keep the option there (or even in both places, when a draft has been created).
I would suggest having the option available in both places for ease of use.