Little sign of foraging, but some entrances are opened

Little sign of foraging, but some entrances are opened, or collapsed with bark/leaves stuck there, so definitely some activities. All food have some leftover, no obvious sign of interest in Ficus virens var. sublanceolata. Found little piece of Eucalyptus torelliana， means they really don't like it much since take them 10 days still can't finish 1 leaf.
Observed no one apart from odd B
Offered them 1/2 piece of lettuce