graphics/librsvg2 is stuck on the 2.40 branch due to newer versions requiring a Rust toolchain which we do not have on all tier 2 archs. I packaged a newer librsvg2 version as graphics/librsvg2-rust. It is now on a stable version 2.46.0 which was just released . Let's switch to it on tier 1 archs. OpenBSD has been doing something similar for over a year now.
2.46.0 is ABI compatible with 2.40. However newer APIs are only implemented in newer librsvg2 versions and I suspect it is only a matter of time until someone runs into trouble porting some applications.