I have FP4 as well and I would say that they do a rather poor job on the SW side of things. The default camera up somewhere along the lines became laggy when switching to wide screen, security updates come out months late, and Android 13 still isn't out (even for Android 12 they took a long time to get that prepared and released).
I'm probably going to switch to LineageOS at some point, but I just wasn't in the mood for to go out of my way and set it up (even if I've been using LineageOS extensively on all phones I got beforehand).
Thanks for pointing that out. I knew LineageOS and /e/ already had the Android 13 builds for the Fairphone 4. First time I'm hearing about CalyxOS, and the official webpage isn't in-depth enough to point how much different they are from LineageOS. Their own two bundled apps look interesting (the backup and outbound connection control ones) based on the one/two sentences I've found, but overall seems like a smaller community than LineageOS.
I'm probably going to switch to LineageOS at some point, but I just wasn't in the mood for to go out of my way and set it up (even if I've been using LineageOS extensively on all phones I got beforehand).