In the documentation string in define-minor-mode edebug-mode in edebug.el:
1. The option `edebug-on-signal' is listed, but it does not exist in the file.
2. The following options, which are described in (elisp) Edebug Options, are missing:
edebug-sit-for-seconds, edebug-sit-on-break, edebug-behavior-alist,
As mentioned in the Subject line, this is in GNU Emacs version 27.1.