can i connect two additional monitors to the iMac 24 m3

No. The M3 iMac supports only ONE external display in addition to its own.

click here ➜ iMac - Technical Specifications - Apple

If you require 3 displays total, and you want a desktop computer, you will need a Mac Mini with the M2 Pro CPU or a Mac Studio.

click here ➜ Mac mini - Technical Specifications - Apple

and here ➜ Mac Studio - Technical Specifications - Apple

No, the 24" iMac can only have one external display added to it. You can find this information in the Technical Specifications for the computer. If you have a need for more than 1 external display, you may be a good candidate for the Mac mini M2 Pro or a Mac Studio.

24" iMac Display Support

Simultaneously supports full native resolution on the built-in display at 1 billion colors and:

• One external display with up to 6K resolution at 60Hz

Thunderbolt 3 digital video output

• Native DisplayPort output over USB-C
• VGA, HDMI, DVI, and Thunderbolt 2 output supported using adapters (sold separately)

Mac Studio

M2 Max

Simultaneous support for up to five displays:

• Four displays with 6K resolution at 60Hz over Thunderbolt and one display with 4K resolution at 60Hz over HDMI
• Two displays with 6K resolution at 60Hz over Thunderbolt and one display with 8K resolution at 60Hz or 4K resolution at up to 240Hz over HDMI

M2 Ultra

Simultaneous support for up to eight displays:

• Eight displays with up to 4K resolution at 60Hz
• Six displays with up to 6K resolution at 60Hz
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