I use "right-corner-click" for the right click on a MacBook Pro 14".
I, too, have noticed that it can be "touchy" sometimes (literally).
I've noticed that if I have some fingers "too close to" the trackpad in an area OTHER THAN the lower right corner, the right click may not activate. In other words, you have to be careful to NOT "make contact" with any other area of the trackpad while you go for the right click.
I've tried to "discipline myself" to avoid this, but... still happens.
(too old to change, I guess...)