Yes, not all self identified bisexual views themselves as interested in all genders.

Then the latter isn’t an independent term if pansexuals are bisexuals by definition (they are; “all” is “more than one”), and many bisexuals identify as pansexual. This will depend on bisexuality currently current. Pansexuality may not be divorced from bisexuality unless we abandon every definition of bisexuality regardless of “attraction to simply two genders,” which … Continued