Dryer Vent Placement Options
I suggest making a sheet metal “clean-out” box that bridges below the floor joists so the exhaust cuts through the adjacent band board. The clean out box would have an access panel or door on it to allow lint removal, could also be the “j-trap” which avoids cutting through the floor joist, and allows a close exhaust to the exterior.
It is the same as routing the 4” pipe below the floor joist to avoid cutting the joist, but adds the clean out feature to below-joist route. Please use galvanized steel duct work for exhausting your dryer safely. Do not use flexible duct or aluminum duct because both of these do not confine a fire and therefore violate the fire code.