In phpBB 3.2 the BBCode engine was totally change due in part to the "old" one not being compatible with PHP7. Many phpBB 3.1 custom BBCodes will not work with the new engine without some modification.
There are many topics on this board about the problems with BBCodes so I would suggest that you do a bit of searching to see if your specific problem has already been answered and if not post you specific problem together with all relevant code.
David Remember: You only know what you know and - you don't know what you don't know!
I now no longer support any of my extensions but they will start to become available here