Federal Virtual Training located at https://fedvte.usalearning.gov/main.php offers free Cyber training for Fed Gov workers and Vets.
Since new resources haven't been posted here in a while:
You'll probably have to document it to make a case for CPEs, but anything you can find by Grace Hopper is likely both educational and entertaining 🙂
Volunteering gives you some great CPE opportunities. (So does BSides.)
There are lots of good one-off videos on security topics, like this one about not being fooled by click-bait fake news.
You can read books!
You can find resources on Twitter (although, again, you face the documentation/proof problem ...)
If you join the replacement CISSPforum you'll find numerous discussions of CPE possibilities, and lots of details and resources, in the archives ...
Continuing professional development (CPD) or continuing professional education (CPE) is continuing education to maintain knowledge and skills. Most professions have CPD obligations.