I am running QGIS 3.10 under Manjaro. I would like to add SAGA and R support to my QGIS tools as described in this thread (Configuring QGIS and SAGA on Ubuntu). The solution described here does not work in my case, however.
I have installed R 3.6.2 and SAGA 7.5.0-2 and activated the latter in the processing options (R does not appear here). However I can't see any SAGA tools in my toolbox.