I've posted all those links to prevent others from wasting time searching for information you already have been given.
You've been given lots of information already on multiple threads (including 1841 census back in 2018 which today you've called 'new information') and have been asked to provide links to older threads- although you can always add details to an existing thread to update things rather than starting a new topic on the same board.
You've known about Newry clue and already been given advice on records but our archives (PRONI, public libraries, etc.) are closed at the moment due to Covid-19.
If, when PRONI, etc. re-open, someone is going to make a visit, it's not really a matter of them easily searching for your family since 'Newry' can be Newry itself or the surrounding area (people moving to other countries often gave the nearest town or city as their place of origin), you don't have a particular church/religion pinpointed, etc.