Three External Monitors

Use this to determine which Mac that you want.

You can look up models and see if they have a M1 ultra, or Max, or Pro

If you're using a Mac Studio with M1 Ultra:

• You can connect up to five external displays to your Mac using the Thunderbolt 4 (USB-C) and HDMI ports on the front and back of the computer.

If you're using a Mac with M1 Max:

• On MacBook Pro, you can connect up to four external displays to your Mac using the Thunderbolt 4 (USB-C) and HDMI ports.
• On Mac Studio, you can connect up to five external displays to your Mac using the Thunderbolt 4 (USB-C) and HDMI ports on the back of the computer.

If you're using a Mac with M1 Pro:

• You can connect up to two external displays to your Mac using the Thunderbolt 4 (USB-C) and HDMI ports.

If you're using a Mac with the M1 or M2 chip:

• On MacBook Air, 13-inch MacBook Pro, iMac, and Mac mini, you can connect one external display using either of the Thunderbolt / USB 4 ports. On iMac, connect your display to either of the ports with the Thunderbolt symbol .
• On Mac mini, you can connect a second display to the HDMI port.
• Using docks or daisy-chaining devices doesn't increase the number of displays you can connect.

This link explains your options --> Connect a display to your Mac - Apple Support

Then you didn't open the link and read the article, which clearly tells you what Mac supports 3 or more monitors.

WheelieNick simply copied exactly what is contained in the link, which you could have opened.

If you need it to be simpler, the following computers will support 3 monitors:

• Mac Studio with M1 Ultra - up to 5 monitors
• MacBook Pro M1 Max (14" or 16") - up to 4 monitors

Those are your options for a Mac which can run 3 or more monitors.