Hi
I’ve spent some time trying to get /e/ running on XZ1 Compact - I’m the one who started a lot of the threads you’ve been getting confused by.
The only build of /e/ that I have had running on my XZ1C devices was a nougat-based GSI built by @harvey186 quite a while ago. It worked pretty well - thanks @harvey186 - but i really wanted something a bit more up-to-date 
I succeeded in building an unofficial /e/ pie ROM but I couldn’t make it work - my device kept boot looping.
I have also tried some of @harvey186’s GSIs (pie and Android 10 / Q), both /e/ and his own LeOS. These builds have run successfully on many devices but I don’t know if anyone has got hem to work on a XZ1C - I certainly haven’t. I think there is just a problem with XZ1C and Android 10 GSIs - as discussed here. Or maybe I’m just unlucky!
I have managed to get a couple of Android 10 ROMs working:
- I currently have HavocOS 3.10 Official with NanoDroid 23.0.1.20201029 running on my ‘daily driver’. (I started with v.3.09 and upgraded - by dirty-flashing - to 3.10 with no problems. I tried a couple of days ago to upgrade to v3.11: it seemed to work OK, but it wouldn’t play nicely with my backed-up apps and data, so I rolled back to 3.10 as I can’t be bothered to set up all my apps from scratch).
- I have also tried out an unofficial Lineage17.1 ROM on my spare device, and that seemed to work OK too. I had to apply a signature spoofing patch to the ROM as described in this post to get the latest microG working.
I am currently trying to build a LineageOS for microG 17.1 ROM. Yesterday the build got to 99% before running out of disc space. 'Ive freed up some space and it’s now at 96% \0/ If it builds, I will test it and report back in the Unofficial Builds category.
As soon as a working Docker image is made available I plan to try an /e/ Android 10 / Q build. Again I’ll report back as to how it goes. I may also have a try at building without Docker, but there’s a bit of learning fro me to do there, so don’t hold your breath
If you wanted to make a start immediately, then I would go with the Havoc OS / NanoDroid mix or, if you’re comfortable running the patcher script, the Lineage 17.1 / NanoDroid. Or you can wait and see if I (or any of the other unofficial ROM builders) get lucky with an /e/ Q ROM.
I hope that helps, and good luck!