Is there any universal fertilizer / plant food for the barriers garden (I have raspberry, blackberry, blueberry and currant)? Can you recommend any brand sold i.e. at LoweÂs/Home Depot?
There is no universal fertilizer because there is no universal soil.
As far as plant go the nutritional needs of a zinna are not far removed from the nutritional needs of a tomato which are not far removed from the nutritional needs of a maple tree, but the role of fertilizer is to supply what the soil lacks.
The ideal fertilizer then, is the one that puts into the soil whatever plants need that it doesn't already have enough of.
Is there any universal fertilizer / plant food for the barriers garden
There is one kind of more or less "universal" fertilizer and that is organic matter. Feed your Soil Food Web and they will in turn feed you plants and help those plants grow up strong and healthy.
I find raspberries and blackberries need more N than OM alone can provide. Mine in WA state got lawn clippings for the 'natural' fert. The soil was black loam so I was lucky there.
Nonetheless, once you understand your soil and your property and what the plant needs are, you'll learn what they need and go from there.
I think what you're really asking if all those barrier plants have the same nutritional needs, right?
Here is the Nourse Farms planting guides for the berries you've listed, though you'll have to click on them individually. Fertilizer needs are shown. While they're suggesting the timing of chemical fertilizers, assuming your soil is in the pH range given, you can find their equivalent organic fertilizers.
An off the shelf fertilizer might be one of the "Tones" sold commercially like the holly product. I think that most of the big-box retailers stock them. Depending upon the size of your bramble planting it might be cost-advantageous to purchase the ingredients and mix your own.