Your question inspired me to make a video. I did figure out a (kind of funky) way to make a dropdown work as you might expect with Boolean (yes/no) values. I also demonstrate several other interfaces for displaying and/or modifying Booleans in Bubble. Also covers the proper way to negate (invert, or “apply the Boolean not operator”) a yes/no in Bubble.
I hope you find it useful!:
Best regards,
Keith