The Zombi series is quite the confusing franchise. But this film claims to be a direct sequel to the two original Lucio Fulci films. Other than original music cues and reference to the original island the zombies are on, there is no connection.
Here we have a zero-budget film shot in the United States made for the Australian market based on two Italian films that were made as unofficial sequels to an American film (Dawn of the Dead) which was also a sequel to Night of the Living Dead. Which they show clips of in this movie because public domain even though they film it off a TV and looks like crap.
You'll be bored watching this even though it's 57 minutes. In order to pad the runtime as best they can, they put in minutes of footage where nothing is happening as characters are walking around a forest. But that's better than when the characters are talking. Not only are the actors bad, you can barely hear them as the audio was recorded straight from the built-in camera mic.
They also stretch the runtime by long opening credits, lasting about 3 minutes, and about 4 minutes of closing credits. Leaving virtually no plot, no character development, or any lack of care for what's happening.
This feels like an insult to the Fulci films. Those weren't great either and were low budget in their own right but at least there was real effort, talent, and charm to them. Especially if you're familiar with the making of Italian horror films of that time.
If you're going to watch anyway, don't pay for it. It is not worth the money. I was fortunate to watch it for free on Tubi.