Yeah, pfsense apparently just solved this partly (except for aliases) [1], same with OPNsense [2], where there is still an open issue [3]. There are some declined PRs that are not "high priority" [4]. Note that I have just looked these issues up - I don't have insight into any of these. This is not meant as ranting.
It isn’t possible on the UniFi system that replaced it. Who needs basic core functionality anyway.