If you use B4A 8.80+, B4i 5.50+ or B4J 7.00+, I would suggest you the structure below:
Put the additional libraries for the specific products in the specific subfolder.
B4X for the b4xlib libraries.
I use a specific folder, B4XlibXMLFiles, for xml files for the b4xlib libraries generated with this tool
[Tool] b4xlib - XML generation.
And in Path Configuration:
The IDEs will automatically look in the correct subfolder for each product.
DonManfred was faster than me.