You've posted in the Lightroom Classic forum -- are you using Lightroom Classic or the Lightroom cloud version? (If you're not sure, do Help > System Info.) The tutorial linked to by Sahil is for the Lightroom cloud version.
In Lightroom Classic, to make a new preset group (what LR calls a folder of presets), you need to create a dummy preset and create a new group for that dummy preset. Then you can drag and drop presets into that group. Finally, delete the dummy preset. But note that if you delete the dummy preset from the new group before dragging any other presets into the group, the group will disappear! (Yes, this was designed by a professional.)
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