Diagonal Fences Mod 1.16.5 will connect all of the fence kinds in the game in a diagonal direction. Here is the entire feature that you may want to know.

About Diagonal Fences
It is a mod that makes every type of fence capable of assembling together diagonally. Therefore, you can understand how it works without any extra explanation.
Key features
Easy to place diagonal fences wherever
Fast to build unique pen cages to keep animals inside
Only put fences diagonally if there is no other selection
Collision boxes and hit ones will match the new shapes
Completely exist with normal fences that other mods supplement
Operate with various custom ones
Additional information
To prevent a fence from connecting that method, add it to the diagonalfences:non_diagonal_fences block tag.
Because of technical limitations, it’s impossible for the main items to link to other blocks in the current way.
Although you cannot backport to 1.12, it’s feasible to check out the original Fence Overhaul mod by TheWeatherPony.
So far, it’s not possible to find a Fabric port.
The cosmetic Diagonal Fences mod is presently incompatible with The Twilight Forest mod. It requires Minecraft Forge so it can run.
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