These booster bundles are sold and shipped by Walmart!
https://www.walmart.com/ip/Pokemon-Trading-Card-Games-Scarlet-Violet-3-5-151-Booster-Bundle-with-6-Booster-Card-Packs/1160437186?classType=REGULAR&athbdg=L1100
The availability of booster boxes is only going to increase as the Pokemon 151 reprint trickles into stores. I imagine sometime soon we’re going to see regular availability for Pokemon 151 products at places like Walmart.com and Target.com.