Luffy, Zoro and Sanji are the only SH's who don't have to share the width of the page with panels of other characters
Jimbe doesn't get that, and also after the fight Zoro and Sanji mirror each other in the group spread
Group spread where only the M3 get to have dialogue, as is the case in the following example you provided
Where Luffy, Zoro and Sanji once again get to do the talking in the group spread out of the whole crew.
Obviously you can't tell that in this silly cropped image
But Jimbe's a good boy who knows to stand behind the M3, and shut up while they speak.
Cute collaboration between Zoro and Jimbe. We had that with Sanji and Jimbe way back in FI. Oda giving a new member of the crew moments alongside various crew members ( as he did with Robin in the previous chapter ), has nothing to do with the M3.
Luffy's moment comes at the end of the chapter and is alongside X Drake, not Zoro or Jimbe.
Jimbe was paired with Robin when Brook and Franky were paired together. Oda then had them take turns trolling Big Mom. That while Luffy, Zoro and Sanji were each doing their own thing. The M3 never changes, it's a true and tested formula that withstood the test of time, with all " challengers" getting slotted in a tier bellow :cheers: