This would depend on your riding and what you're writing about.
I've received replies from my MPP, MP, and a handful of cabinet ministers over the years writing about a few at-the-time hot topics. Doug Ford, for all his faults, is apparently quite responsive if you just text him (that's secondhand knowledge from a friend, I can't tell you if it's actually him on the other side of the line, but it's a thing that exists. Make of that what you will. )
I regularly receive responses from my reps here in Massachusetts. They also hold town hall meetings where you can ask questions and listen first-hand. I attended one last night and spoke 1:1 with my Congresswoman for a moment afterwards.
I'm sure there are districts where this is not the case in the US - but I hope everyone with concerns reaches out to their elected officials and takes an hour once or twice a year to listen to them in person when they are present in their districts.
If your rep doesn't answer you, tell your neighbors and vote for one who will.