See, I loved one handed mode on my s10e. That resized the whole screen to the bottom left or bottom right, allowing me to easily reach all elements, when I double-tapped the home button.
The pixel takes a completely different route. First, it’s a gesture that doesn’t work if you have the system buttons activated, which I have. Swiping down in the bottom area does nothing if the system buttons are shown and there’s no alternative on screen gesture (like double-tapping home). The alternative is to hold the volume buttons for a second or so, which just kind of feels slow… you do something, then you need to access the top of the screen and just look at your phone for a second while you wait for it to recognize the buttons being pressed and held. It just feels weird and kind of takes you out of the “flow” of doing stuff with your phone. Second (and more importantly) the pixel does its one-handed mode like iPhones do: it simply moves everything down about half of the screen. That gives you access to the top of the screen but shifts the whole bottom of your UI area off-screen, so unlike on Samsungs, where you can essentially work in one-handed mode 100% (at the cost of having UI elements being smaller than usually, so you sometimes mis-click), you need to constantly switch between regular and one-handed mode, which is annoying - doubly so with system buttons, which force you to wait a second to turn on one-handed mode.
So yes, there is kind of a solution, but I don’t think it works too well.
/edit Just found out you can enable a button to show up above the system buttons that enables one-handed mode. That’s actually great and kind of redeems a lot of problems I have. Nice!