So I'm officially starting work to port bird.makeup to other social networks, starting with Instagram. There is some code already written, and the domain is already bought: kilogram.makeup
It will be very bare bone at first, and there will be a list of supported accounts, but as I make it scale those limits will be removed. I also plan to add features that will specifically help #pixelfed, like federating stories.
@radu this feature is more important to me than being easy to install. Also you are welcome to host a mirror on GitHub if you want