With the custom license message and how the OG is all rights reserved, I"m not sure if I should contact you or @RoBrit for the 1.19 port, but here goes:
Do modpack authors have the right to redistribute this mod as an override jar, i.e. in Modrinth modpacks? Alternatively, would you like to release on Modrinth or GitHub?

Additional context: Curseforge does not allow downloading mods from curseforge for modrinth modpacks. So when your mod is not available for download elsewhere, the only option is to redistribute the mod's .jar file inside the modpack and move the files to the mods directory. Manually moving files like this in a modpack is called overriding.

Not a problem from me. You can use it in any shape or form. You can even reupload it to Modrinth if this makes you life easier. Just make sure to update it with the current version of the mod from CurseForge. Have fun!