For me any carb is a carb, so rather than worry about the source of carbs I just count them up.
I buy the 'fun size' apples, the smallest citrus fruits, ordinary lemons as well as the frozen berries from Lidl. I don't have one every day, and I have to confess to wasting a few of them as they've gone bad before I could eat them, but I seem to be able to cope with them - but if I ate a large fruit I might then not eat any more carbs for 24 hours, and might well have not eaten carbs that morning if I knew there would be fruit later.
I found that I could not cope with carbs as well in the morning as in the evening, and if I have two meals a day I would set my limits at 10 and 30gm if all was as usual.
I don't think I've eaten a banana for 7 years or more - I did eat the pulp of the oranges I used to make the Christmas cake as I put in fresh orange and lemon juice along with the Martini Bianco I use to soak the fruit, but it seems that such infrequent and cautious intake of carbs is fine - but I had found that my HbA1c was 43 only weeks before so felt that I had some leeway.
You need to know yourself as some people, if they eat carbs they can't stop themselves from eating more. I used to be like that when I felt all was hopeless, but now I know that I can do it, I do it.