The phrase "discussed mostly" is correct and commonly used in written English
Example: "The topic of climate change was discussed mostly during the conference." In this sentence, the phrase "discussed mostly" is used to indicate that the majority of the conversation or discussion during the conference was focused on the topic of climate change.
Mine was discussed mostly favorably and his was discussed mostly unfavorably, neither of which surprised me.
The images are shared and re-shared and discussed – mostly in horror.
Quantum field theory, however, is a subject that has been discussed mostly by physicists.
The economy was discussed mostly in connection with these other stresses.
Its efficiency had been discussed mostly in the context of injection.
The teams and drivers met the media today and discussed mostly their results from last Sunday's race.
In the Titles Template condition the Discussion and Conclusion section discuss mostly about the analysis so far, what needs to be next, and some issues around differences in results between the groups.
2. Explore how ethnic newspapers help keep New York's immigrant population connected to their homelands and to each other by reading and discussing "Mostly Lost in Translation: Respect for Ethnic Papers".
The university concluded that she did not retaliate or engage in sexual harassment by discussing mostly public information about pseudonymous students in a book meant to critique the Title IX landscape, including false accusations and the use of Title IX to punish those critical of Title IX.
In ensemble learning algorithms, we discuss mostly about how to making a weighting policy for each base classifiers.
Working with exactly the scientific examples Bechtel and Mundale discuss (mostly from the functional neuroanatomy of vision) Aizawa argues that claims about psychological functions do not play the specific role in these studies that Bechtel and Mundale insist, and so the success of these studies does not imply the falsity of multiple realization.
