[yorwba]

The comment you replied to links to a Reddit comment giving examples of schwa deletion in Hindi that is not represented orthographically. Nothing to do with allophony, just "if you were to read this word as written, you'd pronounce a vowel here, but you shouldn't". To give an English example, it's like writing "should not" even though you don't pronounce the "o" in "not".

[gilcot]

I do, as do many other non-native I know, unless you write it "shouldn't" :)

[OJFord]

In 'half-penny', however...