The Sabo/Revs in Marygoeise thing happened before/during Wano (I think it first started during the Whole Cake Island Arc), and since then the Revs have been maintaining an ongoing siege on the sea level. Lulusia was blown up at the tail-end of the Wano arc, and he then got back to the Revs during the Egghead Arc. Since then the Revs have been maintaining an ongoing siege on the ground level.
That said, I think the Koby rescue was actually at the same time as the Egghead Island Arc. The Marines were preparing to go to Egghead to confront the Strawhats when Garp basically showed up and hijacked a ship for a surprise rescue mission.
With the amount of juicy intel Sabo got, he and the his fellow revolutionary commanders who caused a lot of damage on Marijoa have to hastily retreat after doing their main objective, saving Kuma. The destruction of the warehouses there must be to distract the main forces that are stationed there until they can get Kuma and the other slaves out.
As for Koby thou, He was already in a Hospital by the time Luffy reach Egghead island. The strawhats did take their time to recover after their fight with Kaido and Big Mom then add the time they took to journey from Wano to Egghead island so there's a lot that could had happened in between.
One thing for sure is, the Bartolomeo side arc and Blackbeard scheming again kinda lines up when Law and Eustass Kid get attacked by Blackbeard and Shanks while the Egghead arc is happening.