How does Kopia repo sync to S3 handles repo changes, while sync is ongoing?

I am preparing to sync my local Kopia Server repo (500 GB, as of yet) to Wasabi S3. I am running daily snapshots from my clients to my Kopia Server repo and the actual repo sync would be running with --max-upload-speed=1048576 to not hog all of my upstream bandwidth.

However, running a 1 MB/s will cause the repo sync to last or 6 days and I wonder if there’s anything to consider regarding this endeavour… ?