Thanks for the feedback.
Unfortunately, handwriting recognition is not only time consuming, but very difficult. Note that not even Apple support this.
There is a commercial offering, but it is quite expensive, so we have to think about whether we want to raise the price of the app just for that.
There are a few handwriting keyboards you can use already: Nebo and Marzec (I think).
In any case, some pencil support is certainly on the roadmap. We definitely want to be able to draw diagrams and add handwriting (without conversion to text).