In principle, it is possible for a blind person to operate the cooker.
The timer tells the time before the cooker starts. If the time is incorrect, the process can be cancelled.
There is no acoustic feedback when entering the time.
The buttons do not have tactile symbols. (Can be attached if necessary)
A sieve is supplied for steaming vegetables.

Many thanks for this extremely thoughtful and insightful and, above all, enormously helpful answer to the question!