I recommend mowing up any leaves in the yard, and mixing them with the soil in your beds,
Add grass clippings, too, if you are still mowing.
Agreed. I started doing that several years ago, turning under about 10 cubic yards of shredded leaves, collected from my yard & several of my neighbors. People are remarkably willing to let someone else collect their fallen leaves. I try to collect only maple, box elder, or oak - no black walnut or poplar. Ash originally made up about 1/2 of the leaves collected, but those have all been killed now by the emerald ash borer (more than half of my & my neighbors' trees).
The grass in my yard has remained uncut for about a month, to supply some green mixed with the brown when I collect leaves with the mower. In addition to the leaves, I spread wood ashes, soil sulfur (for nutrients & to prevent the ashes from raising the pH) and charcoal from my fire pit, if I find time to screen some out. That combination very quickly restored the fertility that had been declining in my home gardens over the years.
The improvement in the rural garden, after amending that plot for the first time last Fall, was remarkable. The weeds really loved it.
So did the tomatoes, gourds, peppers, and eggplant.
The much-delayed killing freeze is a mixed blessing. On the one hand, even my longer-DTM peppers & runner beans have time to ripen, and the harvest for tomatoes & snap beans continues. On the other hand, I should be cleaning all poles & structures from the gardens, in preparation for spreading leaves. Killing the garden while it is still producing goes against my instincts as a gardener.

With no sign of a freeze in the extended forecast, I'll have to begin taking down everything when/if it dries out.