Hi @johnryanrobles,
Do you want to display more than 2000 items within the Combo Box?
I have a test and the situation is confirmed on my side.
Generally, the Combo Box could display more than 2000 items using the Collect() function.
ForAll(
Sequence(2001),
Collect(colMax, Value)
)
I create a collection containing 20001 items using the above formula, and the Combo Box could display all of them:

So as an alternative solution, you could consider using the Collect() function to store all the comments field items in a collection. Then display the collection within the Combo Box.
Hope it could help.