Multiple-block mining

I am trying to get a multiple-block mining mod, sort of like TapL's chunk miner to work. Despite looking good visually, I can't seem to get it to work. Here's a screenshot to give you an idea of how I'm trying to do this. 

How Does Bitcoin Mining Work? What Is Crypto Mining?

Mining - How does mining work in Bitcoin?

Multi-element geochemical data mining: Implications for block

PLC/Stone Quarry/Diamond Tools/Quarrying Mining/Dressing Cutting

Cybersecurity firm finds hidden Monero mining malware on AWS

What does mining difficulty mean? — Bitpanda Academy

Advanced Mining Philadelphia PA

PDF] Multi-Database Mining

Multi Mine Mod (1.20.2, 1.19.4) - Save Block Breaking Progress

What Happens When Two Blocks are Mined Simultaneously? Bitcoin

Tutorials/Mining – Minecraft Wiki

How to Mine Bitcoins

Consensus Mechanism in Blockchain Training Module on Blockchain