What is current state of Verilog-A model support, OpenVAF, PSP model in ngspice etc. ? Background is that I would like to get ngspice simulation for IHPSG13G2 going on ARM64 (e.g. Raspberry Pi OS)

We have all of this running in IIC-OSIC-TOOLS on x86 and arm64.

Is OpenVAF still maintained ? I do not see much activity on it's github repo.

@FatsieFS I am not involved in this but a bit more up-to-date github: OpenVAF-Reloaded: https://github.com/OpenVAF/OpenVAF-Reloaded

as far as I know Arpad Buermen from Slovenia is making some progress https://github.com/arpadbuermen/OpenVAF