I have no issues with vertical scrolling, but can confirm that the vast majority of my notes render wider than the screen, cutting off some text.
I can reliably reproduce this by creating a new note and giving it a long title, which I reported as "iOS app: Long note titles make editor wider than screen, rendering app practically unusable ", but when I saw this issue & checked, I can confirm it happens even in many notes with shorter titles like OP’s. However, other than the title, I haven’t found a repeatable way to start from a blank note and trigger the issue with the body text.