No, not per se; you cannot load voice expansion packs with new voice samples to the PSR-E models as you can on the PSR-S models.
There are three things that you can do on the PSR-E463:
(1) You can use the two Live Control knobs and/or the voice-related settings in the Function menu to modify the Attack/Release and Cutoff/Resonance parameters of a voice, as well as other voice- and effects-related settings, then save the modified voice to a registration for later recall. This lets you make dramatic changes to the way a voice sounds, but it isn't the same thing as loading a new voice that uses new voice samples.
(2) You can use the sound-sampling feature to add new sounds. I'm unfamiliar with using this feature, so I don't know how much you can do with it; but again, it isn't the same thing as loading new voices in a voice pack.
(3) You can connect the PSR-E463 via its USB TO HOST port to a computer, laptop, tablet, or smartphone so you can use it as a MIDI keyboard controller to play voices and sounds generated by soft synths and other types of virtual instrument plugins, then send those sounds back to the PSR-E463 via USB audio so they come out of the keyboard's speakers.