Hi,
I am not sure why this did not work for you but to go on the safe side,
You can try to use the default format for the timestamp which is yyyy-MM-ddTHH:mm:ss:fffffffK
(complies with ISO 8601 standards). For example in your case: convertFromUtc('2022-01-23T21:50:01','New Zealand Standard Time')
Or try to use formatDateTime
function: convertFromUtc(formatDateTime('2022-01-23 21:50:01', 'yyyy-MM-ddTHH:mm:ss.fffffffZ'),'New Zealand Standard Time')