ImageMagick 2 years old, fails to convert some svgs; fixed upstream

The version of convert (ImageMagick) in Ubuntu is rather outdated:

$ lsb_release -d
Description: Ubuntu Hirsute Hippo (development branch)
$ convert --version
Version: ImageMagick 6.9.10-23 Q16 x86_64 20190101 https://imagemagick.org
Copyright: © 1999-2019 ImageMagick Studio LLC

If I try to convert an svg into a png, it fails:

$ convert tux_mono.svg large.png
convert-im6.q16: unrecognized color `radialGradient29032' @ warning/color.c/GetColorCompliance/1052.
convert-im6.q16: non-conforming drawing primitive definition `fill' @ error/draw.c/RenderMVGContent/4300.

The source image is this one:
https://upload.wikimedia.org/wikipedia/commons/3/3a/Tux_Mono.svg

However, the newest version from upstream is fine.

$ ~/Downloads/magick --version
Version: ImageMagick 7.0.10-59 Q16 x86_64 2021-01-23 https://imagemagick.org
Copyright: (C) 1999-2021 ImageMagick Studio LLC

$ ~/Downloads/magick convert tux_mono.svg large.png
# works perfectly.

Please would you package a more current release, and make it available in 21.04 and 20.04.
Thanks.