Can a great many modify uncountable nouns

Can a great many modify uncountable nouns


First of all: my English is average, but this kind of problem can be solved when I was still in high school
At that time, English was too good&&&&&&&~
Many can only modify countable nouns, but a great many
Also can only modify countable nouns, as for why I have studied the data, but the explanation is not clear