Yes, I'm in Ontario. Ford had put together a Housing Affordability Task Force that said the exact things I'm saying - dozens of recommendations on eliminating red-tape that was blocking infill. Ford ignored all those recommendations (why did he even assemble the HATF if he wasn't going to use their ideas?) and then opened the greenbelt.

See the HATF document:

https://files.ontario.ca/mmah-housing-affordability-task-force-report-en-2022-02-07-v2.pdf (warning, PDF)

Some notable quotes:

Recommendations 3 through 11 address how Ontario can quickly create more housing supply by allowing more housing in more locations “as of right” (without the need for municipal approval) and make better use of transportation investments.

Recommendation 12 would set uniform provincial standards for urban design, including building shadows and setbacks, do away with rules that prioritize preservation of neighbourhood physical character over new housing, no longer require municipal approval of design matters like a building’s colour, texture, type of material or window details, and remove or reduce parking requirements.

See? This is all good urbanism. Good YIMBYism. It's very sad that Ford ignored 99% of the document. And meanwhile, municipalities screamed bloody murder about the HATF recommendations.

we have municipalities trying to get developers to infill

Sauce? Because every person in the industry that I follow says the opposite.

For example, this PDF was missisauga's response to HATF:

https://www.mississauga.ca/wp-content/uploads/2022/03/11152736/Corporate-Report-of-the-Ontario-Housing-Affordability-Task-Force-and-Implications-for-Mississauga-2022-02-24.pdf

Staff have concerns, however, that some of the Task Force’s recommendations may remove some decision making powers from Council, reduce community engagement, lower design standards and could undermine the creation of complete communities. Moreover, certain changes could reduce revenues generated by development related charges which could be a risk to infrastructure and parkland provision.

Mississauga has been one of the worst cities for missing building targets - they had no plan beyond "build tower-in-park highrises downtown, sprawl to our limits and then do nothing everywhere else." And now their Mayor wants to run the Ontario Liberal party, which is so egregious it actually got me to register to vote in their leadership race to support her opponent.

For another example, see this video of deposition by Mark Richardson of Housing Now TO (an affordable housing builder):

https://mastodon.social/@Pxtl/110300343308877005 (yes, this is my mastodon toot, but it's his video).

This is a guy trying to build he’s trying to build subsidized, low-cost housing everybody says they wants. Trying to build Green Buildings everybody says they want. And the municipal government is blocking him at every turn, with “guidelines which are treated like they’re cast in stone”.

$20 billion dollar intersection in Forest Hill; somebody said that should be a 7-storey and 70-unit building in 2018. How…where did that number come from? Somebody picked that number. Because it “conformed to the current planning policy for Forest Hill” and somebody adjacent to the site had a backyard swimming pool. That can’t be our priority in 2023.