Bikes often solve or supplement the last mile problem with connections to transit. Proper bike lanes would be a massive boon to the reach of new and existing public transport.

The Biden admin is also looking at federally improving zoning. https://www.usich.gov/news/white-house-announces-new-actions-to-lower-housing-costs-and-boost-supply

To say nothing about the large amount of zoning reform and organizing happening in every major city in the US. NY's plan for example doesn't just come out of nowhere.