That only affects hiding repeated tuplets, not the brackets in the OP’s example. Dorico is set up to use brackets to try to avoid any tuplet ambiguity, but it still places them in non-ambiguous situations like the Haydn example, which looks unnecessarily cluttered to me. In fact, I’ve never seen brackets used in this particular situation in commercial scores. Hopefully, a future version of Dorico will include a setting to avoid redundant brackets like these. In the meantime, breaking the beam for each tuplet will remove the bracket. BTW, how were the tuplets beamed in the original? Otherwise, you’ll have to select the sections of music with only the 16th tuplets whose beams you want removed and use the properties panel. It’d be really handy if we could program a key combinations for this!