Ubuntu maintains it’s own package library which is far newer then Debians but less tested/stable. Debian only releases new version when it’s team feels their ready. However Debian does keep up to date with security patches
If you would like a distro that keeps itself up to date try out Fedora, it’s updated every 6 months and has been super popular lately
Note that if you use flatpacks they will be up to date no matter what distro you choose, making Debian a very stable option while still getting new features in applications