Debian bookworm (12) ships with version 525, so that’s all you’ll get officially.
Debian bullseye (11) is the one that comes with version 470. So clean-installing that is the best bet.
Or you can try to download a driver package from Nvidia’s website and try to manually install it in an overcomplicated process that involves patching your kernel with dkms. In my personal experience this almost always breaks things and is not recommended.
This is one of the drawbacks with Debian’s “stability”. Every stable version of Debian is a standalone, monolithic bundle of software that rarely allows for version changes.
If possible I’ll suggest you shift to Mint. It comes with a dedicated GUI driver manager for installing and switching multiple driver versions.