Hi @JJR ,
I am thinking about upgrading my XA2 (H4113) to avoid being stuck on /e/ 0.20 as well, but the process looks hard! Thanks for these detailed steps though, I am on linux as well (but could use a machine on widows if necessary).
At the end is all working well? I am worried about the sound & video playback problem reported several times when upgrading from Pie to Q and above.
https://gitlab.e.foundation/e/backlog/-/issues/4500
https://gitlab.com/LineageOS/issues/android/-/issues/1919
The fix proposed in the last link looks to have to have some drawbacks from the latest comment…
Thanks in advance for your feedback 