I just tried to use the addon to see what toys i have and what i dont have. It is missing a bunch of shadowlands ones in particular but i believe BFA is missing a bunch as well. This is one in particular that the addon is not reporting right. https://www.wowhead.com/item=182729/hearty-dragon-plume#comments I use this toy all the time and it says i dont have it.

Fixed in f900880, available as v0.10 on curseforge.

So the way the addon works is that it looks at your toybox panel and lists all the toys it sees there. If you have filters enabled like "only show the toys from mists of pandaria" or whatever the addon won't see the others. There is some code in the addon that enables some of the filters, I should try to see if we can enable the other ones, so I'll rename this issue. However as a temporary workaround you should be able to enable all the filters in your toybox to make the addon export everything.