This is exactly what has been playing out in the Netherlands the past couple of months: the weather institute (KNMI) released their own weather app that is functionally the same (in some cases superior) as the commercial apps that want your consent to track and serve ads.

The commercial parties sued KNMI, even though they use the public data provided by KNMI. Luckily they lost: https://www.dutchnews.nl/2025/02/knmi-weathers-legal-app-sto...

And as a bonus, there was some Streisand Effect when this was in the news, and people have been moving to the KNMI app in droves.