Checkbox items are rendered as images with text next to them, thus the font can be applied to Checkbox.Text property only.
To display checkmark characters from the required font you can use a TextBox item
and specify the expression
that will resolve the textBox value to checked or unchecked character. The attached report demonstrates this approach (can be opened with Standalone Designer R2 2017).
Feel free to log a feature request for having this functionality out-of-the-box into our feedback portal
where other community members can vote for it. In case, there is a demand for such feature we can consider its implementation.
Hope this information helps.
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