No, uv installs pythons available from https://github.com/astral-sh/python-build-standalone by default, which are quite good and have a wide variety of versions available, even on unusual platforms. If those don’t suit your needs, uv can be configured to use (and in some cases install or download, though that gets hairy) other versions you have installed yourself: https://docs.astral.sh/uv/concepts/python-versions/#managed-...