To save some googling for other people: Rayhunter is an initiative to identify when simulated cell towers are being used for surveillance.
I would be surprised if there are other devices for it. I think you’ll want to look at what network bands Verizon uses and see what that corresponds to in Canada. But I really don’t know.
Is this post text written by AI? It seems very, “no, but yes, but maybe”. It’s like it’s written by an LLM trained on clickbait.