The Bug:

Allays in Java edition only see items they're supposed to pick up within a range of about 6-8 blocks, the details are uncertain. This range, in comparison to Bedrock, is astronomically smaller.
In Bedrock, Allays can detect items they're supposed to gather within a range of at LEAST 40 blocks, possibly more, and will fly toward it immediately and back.

How to Reproduce:

1. Set up a situation, probably with a dropper, in which an Allay has to pick up an item on Java edition from a great length; 40 blocks out.
2. The Allay will take no notice, and only go to grab it as you move very close to the item
3. Try the same thing on Bedrock; the Allay will be able to see the item quite far away and will go to collect it.

The attached videos demonstrate this behavior difference in each version.

---------------------------------

Important details as of 22w18a and Beta 1.19.0.3:

Bedrock Item Detection Range: 64
Java Item Detection Range: 32