Depending what your nephew does like there are a few options...
A gaming store called "I want that stuff" hosts gaming nights for a variety of tabletop/card games-
https://iwantthatstuff.store/
Brandon Pride hosts peer events from hang outs, clothing exchanges , etc-
https://www.bdnpride.ca/
Chez Angela hosts knitting & craft nights -
https://chezangela.ca/
Various churches depending on domination hold youth nights for older youth in that age category
Hope he finds his people!