Can't find this on the issues or modlist so I assume it's never been brought up.

CurseForge Link
https://www.curseforge.com/minecraft/mc-mods/better-biome-blend
https://github.com/FionaTheMortal/Better-Biome-Blend

Mod description
Performance mod. Implements faster biome color blending, increasing performance on the client only, especially while moving around and loading chunks. Sodium has a similar optimization.

Why would you like the mod added?
speed

Screenshots if applicable.
One from curseforge, max blend setting is increased:

Mod is missing from 0.5.1 ;/

It's not though :P

oh there it is, til not to use ctrl f on the github editor, do it on raw instead