The direct answer is (probably) NO, for someone would have posted it, I suppose.
Someone assembled a list of placeholders a while ago, you may search here on the forum, but some have gone, some have changed name, and some new ones have been introduced.
It is more practical to make a print of any schedule and then compare output with the original html, to see what the placeholders mean.
For your specific question: you would need !FM1_SPEAKER_B_STUDY! for the lesson number, and !FM1_SPEAKER_B_STUDYNAME! for the name of the lesson.
Similarly, though exercise is used to refer to the suggested exercises at the end of each be-lesson, the word in the various languages for Lesson/study is retrieved by !STUDY!
Some very useful placeholders that I did not spot in the custom templates yet, have been used in the attached template, created by another user.