AFAIK, Ofelia is no longer maintained. Perhaps a more recent fork of it is ofxOfeliaExtended (https://github.com/Jonathhhan/ofxOfeliaExtended) by @jona if I'm not mistaken.

I think I have 0.55.0 or something. Wanna write to Pd's mailing list, or file an issue on GitHub?

What do you mean by all inputs? Mouse and keyboard? I've never faced this issue, but I usually SSH into the Pi when patching Pd in it. Did you try that?
BTW, compiling is not complicated at all.

Is it about finding extenral objects? First off, you'll need to install all these externals to the computer you want to load your patch in. If you do that, why not set their paths while downloading them? Or are you copying the externals from your computer to the other one? If that is the case, you could also put all the externals you use in a single directory and then set that in the other computer's Pd paths. It shouldn't be a lot of work.

On Linux, the preferences are saved in the home directory as .pdsettings. So, if I were to transfer my Pd preferences to another Linux computer, I would just copy that file to the other computer's home directory. On macOS, I don't know where this file is, but it should be something similar.

Here's the link to the book @fer mentions: https://mitpress.mit.edu/9780262014410/designing-sound/

@lacuna small correction: as of Pd-0.55.0, the Deken plugin is found under Tools in Pd's menu.

That's strange. Remove the word "byte" from lines 37, 44, 45, 50, and 53. That should do it.

Takes a bit of reading. You might want to check this tutorial https://drymonitis.me/wp-content/uploads/2023/09/Arduino_for_Pders.pdf
and these abstractions https://github.com/alexdrymonitis/Arduino_Pd

Controlling digital I/O from Pd is not so difficult. What is it exactly that you are trying to do? You want to activate-deactivate digital pins?