WOTC made this announcement today. Basically, if stores want to increase their allocation of pre-release packs and other materials, they have a year from the Forgotten Realms release to get numbers us. Metrics, in WOTC speak, is the number of players at events:
Wednesday, June 16, 2021
Metrics will only be counted in the U.S. to start, but other regions will follow.
Beginning with the AFR Prerelease on July 16, metrics will be counted in the U.S. Other regions can expect to have metrics counted again shortly after play suspension is lifted in that area. We will continue to provide updates about the status of in-store play globally as they occur.
You will have a full year to build up your metrics starting from the date metrics begin counting in your region.
During that grace period, promo and product allocations will be based on either the metric snapshot from Q1 2020 or your live metrics. After that period, only your live metrics will be used to determine allocations.