It will only support 1 external display when using an M1 or M2 MacBook.

(Dual display supported only on Apple M1 Pro/Max and intel based MacBooks)

This is not a limitation of the Dock, but a limitation of the Thunderbolt 3 / USB4 ports on the new M1/M2-based Macs.

All other functionality on the dock including laptop charging will work as normal.

For Dual Display support, we recommend the following adapters that were designed specifically for M1/M2 MacBooks by downloading the free software SiliconMotion (SiliconMotion is only supported with the following adapters) 

USB-C MULTIMEDIA ADAPTER M1
USB-C MULTIPORT MX ADAPTER