Buy Qwiizlab Aluminum USB C Hub SSD Enclosure, Fits PCIe 3.0 NVMe M.2 SSD, 2.5-inch SATA HDD, Docking Station USB-C 10Gbps, SD/Micro Card Readers UHS-I for Mac Studio Mac Mini 2018/2020 (Silver)
Satechi Type-C Stand & Hub with SSD Enclosure – Fits M.2 SATA SSD, USB-C Data Port, Micro/SD Card Readers, USB-A & Headphone Jack Port - Compatible with Mac Studio and 2020 Mac
Satechi Multiport MX USB-C Adapter for M1 Mac | Gadgetsin
Satechi USB-C Hybrid Multiport Adapter with SSD Enclosure - Space Grey
Satechi's USB-C hub can hold an SSD if you have more money than ports - Wilson's Media