I just did some research and found out it didnt say removed herobrine. Does this mean herobrines back in 21W08A? See the picture in attachments.
Notch and the minecraft creators always puts in a removed herobrine change in the update log. And this update they didnt change it. And as you also can see in the attachments is that in the 1.15 update it said "Removed Herobrine". And it didnt in the 1.16 either. Either are Notch playing with us or Herobrine is back