just because mastodon mainline dropped support doesn’t mean that there isn’t much support still present. Pawoo forked off of mainline long before ostatus was dropped and I am pretty certain they never removed it and they are still the biggest instance.
also this map is opensource so you are welcome to submit patches to it if you want.
The social network of the future: No ads, no corporate surveillance, ethical design, and decentralization! Own your data with Mastodon!