Generally one would plant or replant in larger container at the same height/elevation as it was in the previous container.
This is general good gardening practice.
The plant will always grow into the new container.
No need to put spacers in containers for the novice/backyard gardener.
Some growers use this method to control growing costs.....if used at all.
In South Florida USA I have not seen this....growers just put the plant in a large airpot.
Locally we do one container for a plant .
The larger the plant the larger the container
Save Your Dirt: Best Planter Inserts For Containers | Apartment Therapy