I mean he attempted leg locks and other stuff. People were talking about it like how good Ngannou's ground game improved. Gane wasn't taken down until Ngannou, who probably no one expected to take Gane down and it's possible he didn't train for any takedowns in prep. He even stuffed JDS and has won by heel hook and arm triangle in UFC. The way people talk is like he gets toppled over by a slight breeze and falls to the ground. Also he usually does good keeping distance so you can't even close the gap to attempt the takedown.