Of course, this is strongly recommended!
For example :
If there are many speakers using the prompter, it is possible to process a large volume of text so that rehearsals can take place without wasting time.
There needs to be time allocated to prepare a text so that it is readable on the teleprompter, as well as the text changes requested by the client (which we can ensure in real time thanks to the presence of the second operator).
In the case of LIVE filming; it is preferable to have a second operator on site to scroll the text on a “Spare” PC for added security.