I read project readme, checked client side and server side configurations, and no such feature exists - YES

Is your feature request related to a problem? Please describe.
Currently there is no way to block any attack with double-handed swords.

Describe the solution you'd like
Maybe by adding a sword shielding mechanic, kinda like Minecraft 1.8 below blocking. It would look good with the double-handed sword because they're big but of course make the cooldown a bit longer

Two handed items are two handed.

Parrying is a huge balance issue, requiring custom stamina system or something.
Out of scope. Check project goals.