We do have support for both our MakeCode and Python editors on Raspbian Pixel. This can be provided via our normal web browser based editors using Chromium or using offline editors. We do recommend the use of RPi 3 for sufficient computing power using the web browser.
Instructions for MakeCode on Raspberry Pi
Instructions for offline Python (Mu) on Raspberry Pi
Using the Online Python on Raspberry Pi
Instructions for offline Python on Raspberry Pi using a local machine web experience