Yes. The E2 has been into LCY. It came in before Farnborough.
https://www.londoncityairport.com/me...mbraer-e190-e2
I would imagine the big plus for the A220 is that it can operate JFK non-stop and potentially open additional routes. By the time these are delivered the new stands will also be open which will offer around 12 or more that could take the A220 which should be sufficient.