In previous versions of ubuntu, that package would install chromium, as one would expect.
In recent versions of ubuntu, this package is a stub that installs snapd, and then snapd installs chromium.
There is a substantial difference between those two things. Users that try to install chromium through an open package management system are being pushed to Canonical's proprietary store.
https://packages.ubuntu.com/focal/chromium-browser
In previous versions of ubuntu, that package would install chromium, as one would expect.
In recent versions of ubuntu, this package is a stub that installs snapd, and then snapd installs chromium.
There is a substantial difference between those two things. Users that try to install chromium through an open package management system are being pushed to Canonical's proprietary store.