An amusing typo – but is it really a typo?

I received an email today with an amusing typo, "sincelery" for "sincerely", and my post about it generated a number of comments. But now I wonder about this typo. After all, this is not a case of switching two letters that are next to each other in a word ("sicnerely" might pop up while typing quickly, say) or switching two letters that are next to each other on a standard keyboard ("soncerely", for example). Two letters are exchanged that are separated by a letter in the word, and the exchanged letters are on different sides of the keyboard. I wonder, then, if it might be a spelling mixup created by dyslexia. (Andrew Shields, #111words, 21 October 2021)