@XavierGadgets M1 macs can support plenty of monitors. I run three on my Mac Studio. The problem is you need at least an M1 Max or the 14" which has an HDMI port so that you can run two monitors. I run a 360Hz 1080p monitor, a 240Hz 1440p monitor, and a 60Hz 1440p monitor. All refresh rates work fine except the 360Hz one, it caps at 240Hz (likely OS limited)