I'd argue that at the moment, them, BLACKPINK and aespa are the trendiest GGs in Korea(I need a follow-up from IVE to determine where they stand).
I mean look at these digital points.
Nonstop - 860M (#13 on Gaon year-end & #2 for GGs)
Dolphin - 950M(still charting as we speak) (#22 on Gaon year-end & #4 for GGs)
Luckily they managed to keep the hype with Dun Dun Dance as well:
DDD - 516M points(and counting) (#15 on Gaon year-end & #3 for GGs)
Goddess IU has given her stamp of approval:
She even wrote a song for them
Arin is one of the most popular female idols at the moment as well. 6th most searched female idol on YT SK in 2021(#8 in 2020), 9th most searched among teens in 2021
She's also done CFs for Cham Soju & is set to star in a drama.
TL;DR: Don't sleep on Oh My Girl