I can't stand PP (he panders too much to extremists like antivaxxers and anti-trans chuds like Dr Peterson and was anti-spending during pandemic shut-downs) but his approach to housing is probably the best one on the table: he wants to specifically target municipal red tape and punish cities by cutting federal funding to large cities that don't upzone and hit their housing targets. These are specific policy planks with hard numbers in them. There are parts I disagree with (like restricting it to municipalities over 0.5M residents) but it's the right direction.
I'm firmly in the YIMBY camp, and PP is the only person talking anything approaching sense on that particular issue. Ford had the Housing Affordability Task Force tell him the same thing, and he threw away 99% of their recommendations and instead focused on handing the Greenbelt out to his croneys.
Trudeau has the Housing Accelerator Fund for similar purpose, but that's carrots instead of sticks. Municipalities have spent decades fighting tooth and nail against infill housing, they deserve sticks and not carrots. It was municipal governments that put us behind this 8-ball, and then the post-pandemic era sunk it.
edit: downvote away, but the fact is he does have a specific plan. Unfortunately NatPo is the only media source I could find writing about it - better-media sources with info and analysis of his plan welcome.
https://nationalpost.com/news/politics/poilievre-promises-carrots-and-sticks-to-get-big-cities-to-build-more-housing