A korean poster did most of the legwork on this, but it's basically a collection of Idol songs that managed to make the top 50 end of year on the digital Circle Chart.
I think it kinda gives an interesting perspective on the industry as a whole. The Creator purposefully did not include Solos.
2018 top 50 Idol songs
1. Ikon - Love Scenario
6. Blackpink - Ddu Du Ddu Du
12. Mamamoo - Starry Night
16. BTS - DNA
18. BTS - Fake Love
19. BTS - 봄날
20. Twice - Dance The Night Away
26. Twice - What is Love?
30. Red Velvet - Bad Boy
34. Twice - Heart Shaker
35. GFriend - Time for the Moon Night
36. Wanna One - Energetic
43. Apink - I'm So Sick
44. EXO - Universe
45. BtoB - Only One for Me
49. Mamamoo - Egotistic
21 Songs
11 GG
10 BG
2019 TOP 50 Idol songs
3. BTS - Boy With Luv
13. N.Flying - Rooftop
14. ITZY - Dalla Dalla
28. Twice - Fancy
36. BTS - Spring Day
37. BTS - IDOL
43. BlackPink - Kill This Love
49. EXO - Love Shot
9 Songs
4 GG
5 BG
2020 Top 50 Idol Songs
9. BTS - Boy With Luv
10. Red Velvet - Psycho
12. BTS - Dynamite
15. BlackPink - How You Like That
16. OMG - Nonstop
17. BTS - ON
24. OMG - Dolphin
30. Mamamoo - HIP
34. BTS - Spring Day
35. BTS - Black Swan
47. IZ*One - FIESTA
48. Apink - Dumhdurum
12 Songs
7 GG
5 BG
2021 Top 50 Idol Songs
2. Brave Girls - Rolling
3. BTS - Dynamite
8. BTS - Butter
14. BlackPink - Lovesick Girls
17. Brave girls - We Ride
18. OMG - Dun Dun Dance
25. BTS - Life Goes On
29. BTS - Boy With Luv
30. StayC - ASAP
36. Oh My Girl - Dolphin
12 Songs
7 GG
5 BG
2022 Top 50 Idol Songs
2. (G)I-DLE - Tomboy
6. IVE - Eleven
7. BigBang - Still Life
14. Red Velvet - Feel My Rhythm
18. IVE - After LIKE
30. BTS - Dynamite
35. BTS - Butter
46. BTS - Permission to Dance
15 Songs
11 GG
4 BG