No, it didn't come up. They were specifically examining Sacred Scripture and the Fathers with regard to the contention that the earth moved. Regardless, no determination was made regarding the shape of the earth ... one way or the other.
They probably should have looked into it, as the Church Fathers were unanimous that there was a physical firmament that kept physical waters off the earth ... as is clearly found in Sacred Scripture.
What I’m suggesting is that, to me, it’s impossible to believe that the Earth’s shape didn’t come up since the Earth was certainly the central object in the controversy. This of course is assuming that the common opinion at the time was that the Earth was actually flat or variation there of.
You can even hear Saint Robert Bellarmine, the pope, and the trial judges saying, ‘this nut Galileo believes that the Earth is some sort of ball!!! Do you believe it’?
Now, if the common opinion was that the Earth was in fact a globe, then yes, it’s shape wouldn’t have been contested and thus not have been discussed and I would agree with you on this point.