operator ||

https://github.com/nodejs/node/blob/d68dd62bd0a0f4ce2320f017f5c63cbe5db9b916/lib/internal/fs/promises.js#L524

If the value is "0", it is converted to "null", which causes the low-level read position of the file to be taken into account. I suggest:
`position = bufferOrOptions.position ?? null;`.

Operator `||` - this **evil!**