Last month, Flesh and Blood's Monarch (see "TCGplayer Top 25 Sealed TCG Products (With Price Shifts) - May 2021") topped the charts while Magic's Modern Horizons 2 and Pokemon's Chilling Reign were still in the preorder cycle. Upon their respective releases in June, both sets sold incredibly well. Modern Horizons 2 sold so well that four of its products managed to grab spots on the top 10 slots of the chart (see "TCGplayer Top 25 Sealed TCG Products (With Price Shifts) - June 2021").
This trend can be likely be partially attributed to the return of in-store organized play, as the product that captured the #8 slot was the Modern Horizons 2 Prerelease Pack. This product type had been a bit of a laggard on the sealed charts since OP went down due to the COVID-19 pandemic (see "Wizards of the Coast Temporarily Suspends 'Magic: The Gathering' In-Store Play in U.S. and Latin America"). At-home prereleases kept sales steady, but they were no substitute for sales power of in-person events that returned in to the U.S. in May (see "U.S. In-Store Play Suspension for 'Magic: The Gathering' Will End Soon").Mark Rosewater Teases Cards in Upcoming 'D&D' 'Magic: The Gathering' Set"), which may have been too late to make an impact on the June chart.
Pokemon TCG and Yu-Gi-Oh! TCG carved up the majority of the slots on the rest of the chart. Unsurprisingly, Chilling Reign Booster Box claimed the #1 slot, as Pokemon is still the hottest TCG. Flesh and Blood, Digimon, and Dragon Ball Super all hung onto one slot each on the chart after their respective major Q2 releases.