Hi,
You can add your styling to the list items with the style tags: <li style="">
I assume this is a temporary solution. Acyba might come up with a list button in the editor toolbar, at least I think they should. If it is not in the next release (according Alexandre in another thread to be expected this week) you can add it as a feature request on Acyba's website (https://www.acyba.com/community/feature-requests.html) after which other users can upvote it.
By the way, it';s better to not include your <ul> and <ol> tags within the <p> element. Close your <p>, create your list and then continue your text with a new <p> element.