The first chapter from this new arc really showed only Miku and Nino that were able to deal with their personal struggle.
Miku with her low self-esteem.
Nino who couldn't accept that everyone gradually changes.
The other 3 sisters were far from done to deal with their personal own personal struggle.
Itsuki who's still doubt Fuutarou and trying so hard to be like her mother.
Yotsuba with her lies and her feeling inferior toward her sister for not being useful.
Ichika with....her feeling guilty for being sneaky (tbh, I'm not really sure with Ichika's problem. I though it's already resolved on the school trip before, but it feels somehow it's not done yet).