Colin Deacon seems to care: https://www.linkedin.com/feed/update/urn:li:activity:7519403...
Paula Simons has also been actively listening to Canadians on this subject. https://sencanada.ca/en/senators/simons-paula/
Paula Simons is almost certainly against Bill C-22, so it probably won't be of any use to contact her about rejecting it. I would focus efforts on other Senators.
Members of the Senate committee reviewing C-22:
Marty Deacon (Ontario) Committee chair 613-943-3429 Tony Ince (Nova Scotia) Deputy chair 343-991-5540 Andrew Cardozo (Ontario) Committee member 613-996-9545 Katherine Hay (Ontario) Committee member 343-991-5536 Rebecca Patterson (Ontario) Committee member 613-995-2185 Hassan Yussuff (Ontario) Committee member 613-944-1108 Kim Pate (Ontario) Committee member 613-995-9220 John M. McNair (New Brunswick) Committee member 613-995-5060 Victor Boudreau (New Brunswick) Committee member 613-947-4110 Judy A. White (Newfoundland and Labrador) Committee member 613-996-2433