They actually used to. My '00 Thunderbird Sport had four-way flashers and a trigger to flash the high beam.. My '00 Trophy has them too. Sadly, the Rocket has neither..
Yup, my 97 Tiger had the hazard flashers and a high beam flasher switch. I added yellow strobing LED lights this year at Daytona for when I do Patriot Guard escorts. Really like the strobing LED's. I've had to use them on group rides a few times while helping some broke down HD's.