Junicode:dlig how to get the discretionary ligatures working in localc

[clear]

I’d like to have circled numbers, as explained in 2019 by @RGB-es here:

Create round borders/circles around numbering numbers?

There are a couple of fonts that offer “numbers in circles” through OpenType substitutions. For example, with Junicode you can get any number from 0 to 20 inside a circle (and from 1 to 9 inside a double circle) using the +dlig feature and Sukhumala uses +nalt for a similar effect [image description] As you can see you cannot compose arbitrary numbers and you are limited to what the font provides. To learn more about how to use OpenType features in Writer, you can check my book about Writer.…

So I’ve installed junicode in my debian system. Now, junicode itself is showing up in localc as being available. But when the colum is formated to use junicode, my cell is contains [10], it doesn’t appear circled. It is displayed as a different font, but it is not displayed as a circle 10. I’ve tried that with the cell formatted as a number and as text.