What Should Be Added or Changed?

• you should add compatibility for Nether+ in 1.15.2 or lower versions as the mod adds the nether update to 1.12.2-1.15.2

Why Should This Be Done?

• this would allow for netherite coating in older versions of the mod
  mod link: https://www.curseforge.com/minecraft/mc-mods/netherplus

Not willing to do this, sorry. I'd rather keep 1.15.2 stable, so I won't add major new features.