I've raised a PR to add keybindings for Easy PG, the build in tool in Emacs to encrypt/decrypt files with PGP https://github.com/syl20bnr/spacemacs/pull/13444 If there are any other things to add, let me know on the PR or as a threat to this post. Thank you.
If you use layouts, then I also created this PR today to update the layouts documentation https://github.com/syl20bnr/spacemacs/pull/13443 I also explain the options for killing buffers when killing a layout with SPC l x
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