Minecraft version: 1.16.5
Forge version: 1.16
Environment: Singleplayer

Mod name: nether portal spread
Mod version: x.x

how do I change the speed of nether spreading?

Check out https://github.com/ricksouth/serilum-mc-mods/wiki/How-To-Configure-mods for more detailed steps. Thanks for giving the mod a try!

From the FAQ:

All my mods use the Forge Configuration Manager. The config files are located in your root minecraft folder in ./config/. You can edit the .toml files with any text editor, like notepad. The name of the config file starts with the mod id.

Inside the .toml file, there should be a config option spreadDelayTicks which you can change. From the mod's description:

spreadDelayTicks (default = 40, min 1, max 72000): The delay in ticks in between the spread around the nether portal. 20 ticks = 1 second.

From the FAQ:

All my mods use the Forge Configuration Manager. The config files are located in your root minecraft folder in ./config/. You can edit the .toml files with any text editor, like notepad. The name of the config file starts with the mod id.

Inside the .toml file, there should be a config option spreadDelayTicks which you can change. From the mod's description:

spreadDelayTicks (default = 40, min 1, max 72000): The delay in ticks in between the spread around the nether portal. 20 ticks = 1 second.

I found the config files but I dont see the mod in there.. what to do?