As far as I can tell, the Pinephone version of Ubuntu Touch doesn't support ADB (which would make sense). It looks like the core dependency of this tool is actually SSH though, and that ADB is just used to automatically set up SSH for the user. The tool should also support manually-configured SSH, so that Pinephone users can use it as well.
Note that all of this is based on a very quick look at the source code, and there's a high liklihood of details being wrong.
As far as I can tell, the Pinephone version of Ubuntu Touch doesn't support ADB (which would make sense). It looks like the core dependency of this tool is actually SSH though, and that ADB is just used to automatically set up SSH for the user. The tool should also support manually-configured SSH, so that Pinephone users can use it as well.
Note that all of this is based on a very quick look at the source code, and there's a high liklihood of details being wrong.