Hi Robert,
There’s no name for that LH pattern, in fact, for a lot of the items on all the keyboard lessons there are no formal names because the world of reggae music education is so new. In many cases I am making up these names and try to make them as accurate descriptors as possible. (I mention this on one of the intro videos.) That said, the LH is playing one regular bubble and one mento chop and repeating it. It’s tricky!