To my knowledge, Canon’s CR3 files are supported in the latest development version. Or at least most of the different CR3 types.
There are many topics about this here on Pixls. Here’s the last known issue, which was fixed within days and is now part of the master branch.
You do need to use the latest development version (Direct download links), the “latest” stable version is over 2 years old and should not be used any longer.