Bugs

Share preview is pixelated and that doesn't provide a good experience when it is shared. Make it high res PNG instead of optimized WebP.

I selected the image and then clicked on the alignment menu. I didn't notice the in situ alignment options and hit the toolbar alignment and it didn't work. You should probably allow both in situ and from toolbar, or make the toolbar alignment grayed out to force user to use the in situ adjustment

While writing a content, it is not scrolling up automatically and even when manually scrolling up, the last line is hidden which makes it difficult to read it until the next line is typed.