So normally I know
Chunks can be loaded when other entities like items for example enters a nether portal
the issue
Items can't load chunks when entering a nether portal, while it can in java
As you can see in the attached file I throw the item using dispenser and a command block always active with command "/say chunk loaded"
The command somehow doesn't run and the dispenser in the overworld won't continue to put out the item in it even after I throw another item from the nether
Chunks are not loaded by entities. Only players (and defined "ticking areas") can cause chunks to be simulated.