Portrayal wise it doesn't make sense for Oda to show a character failing to be effective in their introduction, which is what GB at Udon was, but I'll just run through the debunks
GB was effective against the Beast Pirates. He was there to beat the rest of the Beast Pirates and he did. He did fail to beat the samurai and capture Luffy.
We don't know what condition King's body was in afterwards since we only saw one panel of King before the scene cut away
We know King was hit by 3 attacks from Zoro that damaged him.
One to the head.
One that ran from his abdomen to his head.
One across his chest.
This was the strongest attack.
It makes no sense for his chest to not need bandages but his head does when he took a stronger attack to the chest.
As many have speculated, Oda was demonstrating both effects of Greenbull's vine, the piercing and the draining
One Piece is a manga who's panels read left to right, and King is shown first, then Queen, just as someone is stabbed before they are drained, which also explains why King's wound has a visual lines and Queen's did not
His vines could pierce and drain all of the beast pirates except for King. That what the manga showed. King's durability doesn't need to be weakened to show off GB power.
Unlike against P1 and Ulti, King's wound has blood indicating piercage and King is coughing up
That doesn't change the fact the hitmark used on King was the.same type used when Oda wants to show attacks failing to pierce its target.
Unlike P1 and Ulti, King was recovering from severe injuries.
They weren't there before, they are now. Simple as that
If you would like to say Oda forgot to draw them, he drew the bandages on Kings forehead so he was intending on drawing bandages, but didn't draw any for his neck or upper chest
The bandages weren't there because Oda made a mistake. Similar to him given Nusjuro a cane sword instead of the demon splitter when he clashed against Zoro.
Oda make mistakes. That's nothing new. Maybe more often than we like but that doesn't change the fact Oda makes mistakes. There's no need to cope over it.