Tbh, two monitors don’t help me at all. I set up a cool home office during covid with all upgrades I could think of. Hardly ever used the second monitor. I even had difficulties filling my laptop screen with meaningful additional content. Also, neck pain of constantly working with a turned head is real.
The most important upgrade IMHO is a good chair, followed by a USB-C docking station and maybe a robotic arm for the display to adjust height and free some space on the desk