No, DUB cranks are not compatible with any existing bottom bracket.

DUB is the deign of the crank spindle and the bearings in the BB. A dub crank only fits in a dub bottom bracket. It’s possible to get DUB bottom brackets that fit in many different frame bottom bracket shell standards, that may be where the confusion originates.

If you want different cranks you either have to get DUB compatible ones, or replace the bottom bracket along with the crank. There are many different crank and bottom brackets that fit in a threaded bottom bracket frame shell.

In your position, I would look for a used SRAM DUB crank that is a drop-in replacement for your current one; possibly one in rough condition or missing the chainring that is relatively inexpensive. If you do not like the shorter arms you will be able to sell it for approximately what you purchased it for.