Having a stylus button that allows you to erase is a super powerful feature that other whiteboard apps have. I have tested Miro’s Android app on a Samsung Galaxy Tab S6, with the stock S-pen, and the single stylus button does nothing. Please fix!
I have also tested the web version of Miro using the stylus on a Lenovo X1 Yoga laptop running Ubuntu. There are two stylus buttons on the Lenovo stylus. One of them makes the stylus move the canvas, even while in pen mode, so that’s handy. But the other one does nothing. It would be great if it could be used to erase. Even better if the user could choose what the buttons do, e.g. I’d prefer to have the second one do lasso selection. Moreover, on the X1 Yoga, it would be great if fingers moved the canvas and the stylus drew.
I am using Miro on Windows 10 (web & Windows Store App) The pen works, but there is an extreme lag, and the pen buttons don't have any function. I expect Miro to work the same as other apps, holding down button 1 for eraser and button 2 for lasso select tool. Just adding my upvote.
Have just started using the pen input for android, web and windows. Works well but I agree with the idea stated… being able to use the stylus buttons would be a great feature and would save time to select and erase items. Come on @Miro Community Team… 
Bump. On my Samsung Tab S7, Miro eraser does not work with S-Pen button in drawing mode. @Miro Community Team @Miro Developer Relations