did you ever come across tenon saws with rip teeth for cutting the along grain part of a tenon
Rip teeth were certainly offered on dovetail saws a one time (I have on old one which came new with them), but I can't recall seeing tenon saws being offered with them.
I guess if you had a lot of biggish tenons to cut in the days when it was all hand work, then having rip teeth could help.
The old framers way used to be a large frame saw with fleam teeth (bidirectional cut) which were sometimes called "farmers saws". I remember seeing these used by oak framers as a teenager, but I haven't seen anybody use them since' German carpenters apparently still use them