Yep.
Work offline... and send your changes when you go back online.
You can't edit any existing elements (unless you reserved them before going offline).
This Assumes no one "forced" you to leave the project while you were offline.
... and test it to be sure, incase I've misunderstood your question.
Marc Corney, Architect
Red Canoe Architecture, P. A.
Mac OS 10.15.7 (Catalina) //// Mac OS 14.5 (Sonoma)
Processor: 3.6 GHz 8-Core Intel Core i9 //// Apple M2 Max
Memory: 48 GB 2667 MHz DDR4 //// 32 GB
Graphics: Radeon Pro 580X 8GB //// 12C CPU, 30C GPU
ArchiCAD 25 (5010 USA Full) //// ArchiCAD 27 (4030 USA Full)