Hi Greg! Feature requests are called enhancements, and they go in the GitHub repository for Gutenberg:
https://github.com/WordPress/gutenberg/issues
The good news is that there are already enhancement requests for an Accordion block and for a Tabs block:
https://github.com/WordPress/gutenberg/issues/21584
https://github.com/WordPress/gutenberg/issues/34079
Feel free to create a GitHub account if you don’t already have one, and click the Subscribe button in the right-hand column to follow the progress of each issue.
I hope this is helpful! I’ll mark this thread as resolved for now.
