Goalkeeper injuries are already under review and we are still working on things on that front. Overall though, injuries for outfield players are at a level we're comfortable with and only tracking at around 80% of the real life figures teams suffer. If you feel the distribution between matches/training is incorrect we'd need to see your save game file & realistically we'd need data across multiple seasons. It could simply be bad luck, it could be tactical/training based in its nature too. Therefore, we'd need as much as possible to demonstrate it isn't something that can be explained by other footballing reasons.
A guide on how to share your files is available here: https://community.sigames.com/bugtracker/instructions-and-notes/how-to-upload-files-to-us-r98/