To be fair, this is not the first time we'e heard about this, https://github.com/kubernetes/ingress-nginx/issues/13002 exists since March. However I also thought that the timeline to a complete project halt would be much longer considering the prevalence of the nginx ingress controller. Might also mean that InGate is dead, since it's not mentioned in this post and doesn't seem to be close to any kind of stable release.
It's not a service shutting down though. It will still work fine for a while and it there is a critical security patch required, the community might still be able to add it.
> Let people time to move out, 6 month is not enough.
Did you actually contribute? Either by donations or code? If not, Beggars can't be choosers. You are not entitled to free maintainence for open source software you use.