Is nextdns being maintained?

I am a new user and I am happy of what I am getting, I made a yearly subscription. However I just noticed and it concerns me a bit, that the GitHub repositories have mostly not been updated for nearly a year or more! Except the icloud-private-relay repository, that saw an update back in July.

I just want to make sure I am not using a dead piece of software that sooner or later will become a vulnerability.