That wasn’t a capability of the laptop. The docking station had its own dedicated graphics hardware that drove the extra monitors. Of course the lowest end Macs can do that. When we talk about how many monitors a certain laptop can drive, we mean plugging them in directly to the laptop in some combination of HDMI ports and USB C/Thunderbolt ports.
This is embarrassing, just stop. You can go look up the specs of any chip and how many discrete displays the iGPU supported instead of bickering about what is or isn't a laptop feature. Citing sources isn't illegal or passe.
Exactly how did you attached three monitors to your laptop without a docking station? I bet you the docking station had displaylink based hardware/software like most of the Dell docking stations had
You didn’t give any citations on your specific model of laptop or docking station. You just admitted that you used an old school docking station - those came with GPUs.
And your citation said it wasn’t available in all configurations.