Mirroring instances ("Symbols")

Hey everyone!

This would be crucial to save time:
Being able to mirror multiple instances of a group of objects. Being able to temporarily disable that would be important as well, so that you can manually overwrite some aspects of an instance (e.g. its color while its shape stays the same).
This would be similar to Affinity Designer’s “Symbols”.
For me, this is the feature that would be most impactful in terms of saving time.

Best wishes,