Yes, you do but I updated my answer. It is installed with linuxcnc-uspace as its a dependency.
But running on the older Bullseye kernel probabklly broke some things...
The doc is updated, I saw the dependencies missing during a clean test install earlier, you can remove that section of your post if you will as the command in the docs is one line that resolves any all missing dependencies. And I'll update once that's been fixed in the build package.
I also would not recommend to downgrade from 6.1 unless your system experiences issues or you were on bullseye and had significantly better latency. Otherwise I'd stay with 6.1.
I just did another fresh install using the non-free alpha 1 iso (I still had to install missing firmware to get the gpu to work) and did an apt update and upgrade which did nothing even though I know there is an alpha 2. I then followed the doc in the google drive and triple checked my work. Probe Basic still will not start. What is the one line that you said fixed it? Do you mean the "sudo apt --fix-broken install" line? I already did that on my earlier attempts in order to get the first 2 packages to install. The python3-probe-basic_0.5.3_all.deb package does not give any dependency errors when you install it. I have not yet fixed it but the first error is about the python module "docopt". I assume if I went and installed all those packages I listed it would work.
I will take a look in a bit when I'm at dev again, I noticed a few dependencies listed in the terminal were called in the build package, there may be a version issue going on with it not building into the package. Learning curve for me.. /o\
