Possible to copy objects in the area while duplicating tiles?

Example: https://i.gyazo.com/5edecc4277d2a5a39da03f157aa94a51.mp4

The objects mob_pack could be copied along with the duplicated tiles.

I was reading https://www.boristhebrave.com/2019/07/28/dungeon-generation-in-enter-the-gungeon/ and this would make it easier to move the rooms around to create different hand-crafted maps.

I’m not 100% versed in Tiled, so if this is possible already please let me know how! Thanks in advance

Not currently. Copying is currently limited to one layer at a time. Multi-layer copying is planned, I think, and perhaps that could be extended to also include objects.