Now Orhan's power has been revealed. I actually wasn't too concerned about keeping it a secret for too long, so Orhan's just explaining away for your convenience. Plus with a power like that, explaining can be a good way to intimidate someone.
One of the benefits to Alpha Form is making the user a size category larger. So not only is Lopu much stronger right now, but he's also giant sized like Orhan.
Batuu: Oh crap Lo-poop got bigger! OwO