With his footwork and high guard, he'll never have great tdd. He has in the past shown decent scrambling, though, and decent ability to wrestle back up. Khamzat's is just a special grappler on top.
DDP's coaches said they traveled to train with famous Russians in prep for khamzat's style, and that ddp was escaping the worst positions within 15-30 second with them. Clearly not every good Russian grappler is khamzat, though.
That said, after the fight ddp's coach made it clear that they are making big changes and that he's in contact with people all around the world willing to help fix dricus's issues. They're basically spending the next 4 months travelling to better grapplers and working solely on his ability to wrestle back up before they even accept the next fight. We'll see how it goes. Now that they've felt khamzat, they should have a better idea of what they need from training partners. I don't think he has peaked yet. If he can improve his ability to wrestle back up, it will be a game changer for him.