Extend monitors

Wether a MacBook Pro can support 2 external screens in extended mode depends on the exact model year.

The Recent M1 or M2 13" MacBook Pros for example do not support 2 external monitors at all. Only 1.

MacBook Pro 13-inch - Tech Specs - Apple

If you have a model that supports 2 external monitors, you can try going to System Settings ➜ Displays, click on the display image at the top you want to configure and make sure the "Use As" option just below the displays is set to "Extended Display" from the drop down.

Apple-Silicon 2020 M1 13-in MacBook Pro and Air and 2022 Apple-Silicon M2 13-in MacBook Pro and Air and the 2023 MacBook Air 15-in model are extremely-capable entry-level computers. They can support the internal display AND an External display up to the previously unheard of size of the Apple 6K display at billions of colors. But only ONE in addition to the internal display.

This may not match the way older computers forced you to work, since older computers were not able to support a really large external display. But it is NOT a defect. The spec was available long before you could purchase the computer.

The Apple standard for its built-in hardware-accelerated displays, makes them suitable for full-motion video for production/display of cinema-quality video with NO dropped frames, and NO dropouts or partial-blank scan lines due to memory under-runs or other issues. This requires a hardware rasterizer/display-generator for each fully-accelerated display.

If you need more hardware-accelerated displays than the built-in and ONE external display, and an un-accelerated iPad if desired, you probably need a more capable computer.

If you are only doing program listings, spreadsheets, stock quotes and other slow to change data, there are some other solutions, but they require you to make some strong compromises.

Executive summary: More than ONE additional Hardware-accelerated display can NOT be added to the entry-level 13-in or 15-in M1 or M2 systems.