
With Macbook M1. You CANNOT use the HDMI ports for two external monitors. Only ONE external monitor with M1. I have two Samsung monitors and ended up buying a "Plugable" brand dongle that displays two monitors with different windows. I kept this mokin anyway because of other useful features.

Universal Laptop Docking Station for Windows and Mac - Plugable USB 3.0 Dual DisplayPort 4K Monitor with Gigabit Ethernet, Audio, and 6 USB Ports
12 Review

Enhanced HP USB-C/A Universal Dock G2 - Optimal for Seamless Connectivity (Part#: 5TW13AA#ABA)
11 Review

12-in-1 USB C Docking Station: Dual Monitor, Triple Display, 4K HDMI, VGA, Gigabit Ethernet, SD/TF Card Reader - Compatible with MacBook/Surface/HP/Dell
11 Review

Docking Station OKX Display Ethernet
11 Review