As a layperson, would what is beyond the edge of the (observable) universe, past the 'edge' of the expanding universe, be considered infinite? Or is that nothin

As a layperson, would what is beyond the edge of the (observable) universe, past the 'edge' of the expanding universe, be considered infinite? Or is that nothing / does not exist / null and void? edit: Reading up on things (just wikipedia, bear with me), we don't know how big the universe beyond what is observable is. We can't know because we can't observe it, and what we can observe goes back ~13B years.