Hello @Sjorske and welcome to the Community.
There is a lesson but it is in the subscription only Strumming SOS course (it is called rake strumming).
I briefly demonstrated this in a Vintage Club session several months ago.
It was further discussed in the topic and people gave a few examples (including Breath). Vintage Club #8 with Richard | Rhythm For Advancing Beginners - #10 by Richard_close2u