I would assume it has to do with the plethora of issues in how the camera isn’t accessible through the official APIs.
Still, yeah, this has me essentially looking into getting rid of my Fairphone and buying another one, more or less exactly what this phone should not be about. But I need ARcore on at least one phone I own - and I have no use for owning two phones.
I guess the people in this forum, who are only users of Fairphone, will never be able to answer those questions.
Maybe unless they #contactsupport, get an answer and care to share the response here.
Has anyone tried this guide?
I really want to get a FairPhone as I love what it stands for, but without AR support (dev here), I can’t justify such a purchase.
Hello!
Just tried the guide. It crashes when I launch HelloAR…
Linked is the adb logcat if you want to investigate 
Short extract:
11-15 16:55:23.615 4708 4708 F DEBUG : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
11-15 16:55:23.615 4708 4708 F DEBUG : Build fingerprint: 'Fairphone/FP4eea/FP4:12/SKQ1.220201.001/SP1N:user/release-keys'
11-15 16:55:23.615 4708 4708 F DEBUG : Revision: '0'
11-15 16:55:23.615 4708 4708 F DEBUG : ABI: 'arm'
11-15 16:55:23.615 4708 4708 F DEBUG : Timestamp: 2022-11-15 16:55:23.311223752+0100
11-15 16:55:23.615 4708 4708 F DEBUG : Process uptime: 0s
11-15 16:55:23.615 4708 4708 F DEBUG : Cmdline: com.paramsen.helloar
11-15 16:55:23.615 4708 4708 F DEBUG : pid: 4494, tid: 4533, name: UnityMain >>> com.paramsen.helloar <<<
11-15 16:55:23.615 4708 4708 F DEBUG : uid: 10008
11-15 16:55:23.615 4708 4708 F DEBUG : signal 6 (SIGABRT), code -1 (SI_QUEUE), fault addr --------
11-15 16:55:23.615 4708 4708 F DEBUG : Abort message: 'jni_helper.cc:19 'vm' Must be non NULL'
EDIT: I’m running Fairphone OS but with almost all the google stuff disabled. Don’t know if there is a dependency I’m missing 
EDIT2: Seems the same error they have with a.o. Samsung S8.
Thank you so much for testing this. Shame about the results. Fingers crossed for the FairPhone 4+/5