Leaning heavily on scripts written by wpferguson and ChristianBirzer I’ve written a couple of Lua scripts to integrate DxO PureRAW and Zerene Stacker into my Darktable workflow.
I’ve put them on Github at GitHub - fjb2020/darktable-scripts: Some Lua scripts for darktable in case others are interested.
The DXO script does not work on Linux as there is no DXO version for linux, and the Zerene script does not yet work on linux as I’ve not got a suitable linux platform to test on.