Yes

Yes

Then there's no point in making this PR since the RegionizedServer class exists.

RegionizedServer not exists*

RegionizedServer not exists*

It does, its not in the API so you won't see it on the javadoc.

I checked, when the server is started, the plugin does not find it, I changed it everywhere in my plugins.

I checked, when the server is started, the plugin does not find it, I changed it everywhere in my plugins.

Can't reproduce:

Folia build 36
PacketEvents 2.0 latest commit.
Added System.out.println("Folia: " + io.github.retrooper.packetevents.util.FoliaCompatUtil.isFolia()); in onEnable()

hm...