The converted mills are a pretty good place to start looking.

Below are some mills and also reddit threads about said mills, also referred to as lofts.

https://www.usrubberlofts.com/

https://www.reddit.com/r/providence/comments/10jrfq7/american_wire_residential_lofts_regency_plaza_us/

https://www.reddit.com/r/providence/comments/10jrfq7/american_wire_residential_lofts_regency_plaza_us/

https://www.reddit.com/r/providence/comments/xcflfu/recommendations_for_loft_in_providence/

https://www.reddit.com/r/providence/comments/nol10p/westminster_lofts_review/

https://www.westminsterlofts.com/amenities