MAMA 2021
aespa, ATEEZ, Brave Girls, ENHYPEN, ITZY, Kep1er, NCT 127, NCT DREAM, Stray Kids, and TXT plus two Japanese groups from the Japanese produce series, JO1 and INI.
So basically 10 acts, plus Lee Hyori and the Street Woman Fighter dancing leaders.
MAMA 2022
Bibi, Hyorin, Forestella, DKZ, JO1 (Japanese), Kara , Kep1er, LeSserafim, SKZ, NMixx, txt, Street Man fighter dancing team, Enhypen, Gidle, IVE, Itzy, INI(Japanese), JHope, Lim Youngwoong, Zico, NiziU(Japanese) , Treasure, New Jeans
For comparison, here is MAMA 2020.
Boa, Taemin, BTS, SVT, Twice, NCT, IZOne, Got7, Mamamoo, MonstaX, txt, Treasure, Treasure, OhMyGirl, Craviy, Enhypen, SKZ, The Boys, Ateez , Gidle and JO1(Japanese).
MAMA 2022 is awkward, with some unlikely names in there as well, but other than Kara, JHope and Lim Youngwoong, I think they catered to the 4th gen well. It doesn't have SM acts but other than that it is fairly normal.
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Melon Music Awards 2021
Lee JIeun, Lee Mujin, Heize, Lim Youngwoong, MSG Wannabe (not a real group, but an entertainment unit from a Yoo Jaesuk show), txt, The Boys, Enhypen, Brave Girls and StayC.
Not counting MSG Wannabe , only 4 of them were of 4th Gen, while a certain Lee JIeun, debuting on 2008, was the top billed star.
MMA 2022
Ive ,New Jeans, LeSserafim, Gidle, StayC, MonstaX, txt, Enhypen, ATBO (an act released by IST, owned by Kakao), Melromance, Lim Youngwoong, B'EO, Big Naughty, 10cm and Gomak Boys (including the main singer of Melromance, plus Big Naughty, Paul Kim, Ha Hyunsang and Jung Seunghwan).
It does have 3 Kakao acts (IVE plus ATBO and StayC), plus some vocalist, one hipster, one rapper-turned-singer and and even an artificial group containing vocalists.
It is clear that MMA has been weakened. Already in 2021 they had to rely on a Lee Jieun to liven up the stage, and in 2022 she takes an abssence.
I think that the trend of MMA being behind in the pecking order of Grand Prizes will become more prevalent as larger companies avoid it since it is a domestic award, seen by few foreigners.