Multisexual

Multisexuality is an umbrella term for any form of attraction to more than one gender. It is synonymous with Bisexual, Pluralian, and M-Spec (multisexual spectrum).

It can describe people who are pansexual, polysexual, omnisexual, etc, or be used as a stand-alone identity if one does not wish to specify their sexuality further. The counterpart for this term is monosexual.

Flag
The flag was made official on February 13th, 2019 and the creator went by "synp."

Peace is represented by the purple bar at the top, and unity by white, light blue stands for free and the pink/magenta bar is for love and compassion.

Resources

 * 1) https://www.deviantart.com/kinkflagsrus/art/Multisexual-Official-Pride-Flag-785458128
 * 2) https://pride-color-schemes.tumblr.com/post/146831903966/multi