Banner Unlimited is a mod that allows unlimited* patterns on banners. It overrides the default 6 value, and replaces it with an arbitrarily high value that can be changed in the config.
*the banner amount is not technically unlimited. However, by default it is set to 65536. If this is not enough for you, I question your sanity.
DOES NOT WORK WITH QUARK in 1.18 or above. Quark has a very similar feature that increases the limit to 16. Due to the library we are both using, the game will crash if you use both. Sorry.
FAQ
Update?
I'll try to get around to it, but if I ever leave the modding community, you can update it yourself.
There's something wrong!
Please report it to me on the Github. Banners are coded astoundingly poorly, which means that I basically have to replace the default "6" value everywhere it shows up. If there's one of them I missed, tell me and I'll work it out.
Does this conflict with any mods?
Hopefully not, but it might, if they changed the banner functions. If it does, tell me on the Github and I'll try to fix it.
Fabric/1.12.2/[any backport]?
No. However, you're free to backport/Fabricport it yourself.