That hasn’t been true for a long time. You can store Moderna/Pfizer at fridge temp for 30 days and 6 months at -25, which is fairly easy to achieve at pharmacies. They just weren’t playing around when they first certified it and removed as many variables as possible. They recertified back in 2021 to allow much warmer temps.

https://www.cdc.gov/vaccines/covid-19/info-by-product/moderna/downloads/storage-summary.pdf