#GRASSGIS algorithms used to be named as 'grass7:<algorithm>' in #QGIS. But they also work with GRASS GIS 8!
Since QGIS 3.36 the provider is named... 'grass' ! Just use the algorithm syntax 'grass:<algorithm>'.
Example with R 📦 #qgisprocess: https://r-spatial.github.io/qgisprocess/articles/qgisprocess.html#second-example
