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Yes, it is possible to add this functionality to the Styled Maps add-on.
Unfortunately, at the moment I am not able to upgrade it to support this or any other features as my time is completely taken up with paid work.
I do hope to revisit this add-on in the near future to provide some new features.
I'm sorry I couldn't provide you with good news but unfortunately there is only so much time I can dedicate to developing and upgrading a free add-on.
Thank you for getting in touch and hopefully I can find some time soon to implement a few more features such as your suggestion.
It was a thought that stuck out, figured I should share it. Not exactly dying without it though.
I'm glad you shared your idea as it is a good one and something I think the add-on could benefit from.