Loda offpaneling character interactions between MAIN CHARACTERS I simply bad writing, there's no 2 ways around it
Its arguably why he created Nika for Luffy, so he could have "spice up" the same guy he has been writing about for 20 plus years already. In a sense this is why crew interactions feel so bad. If Oda is bored of the Strawhats why would he EVER waste time on them talking to each other instead of new characters?
And this would in theory be fine, if Oda at leats HINTED at them doing more stuff of-panel but he refuses even that these days!
The reason why it sucks extra hard post-skip is that the whole dynamic of the crew even being a crew is really weird because of his instance of jamming more and more characters into the story and ALSO spending less and less time between islands. Due to how lightning fast Oda overall has handled the travel of the crew post-skip and to a degree pre-skip in-universe it makes a lot of people doubt/question how "close" the crew even is.
Like all slander aside, there has been close to ZERO moments of extended time where the Strawhats can even actively get to know each other/spend time with each other instead of mingling with the new 50 or so characters Oda has them interact with it in the arc instead.
Objectively speaking for example Zoro and Nami spent CONSIDERABLY more time with Perona and Haredas than ANY of the other Strawhats. And unless EoS does a timeskip where it is revealed they spent like 20 years sailing with each other of-panel? That will probably still be true by the end of the story since from the pace Oda has Luffy will probably be Pirate King in like 2 months. And that is kinda wild to me not gonna lie.