yes but most MMA guys do the double and single leg takedown with knee down, even Royce Gracie used to do that.
one of the only sucesfull fighters doing it without knee down was Brock Lesnar and he was a beast.
on wrestling most teachers taught the knee down version and on MMA also...I remember when I was on a free mma class I wanted to do the double leg with no knee and the teacher got angry because "that is not technical"; the same happened on a bjj friend class.
and about Judo they have this as Morote Gari, Kibishu Gaeshi, Kuchiki Taoshi versions but not common used because of the new rules, but even on the Beijing Olympics the way judokas use this was with knee down (like wrestling), so I really saw very very few times people doing doubles and singles with no knee down so I think this is an art almost lost :icon_cry2