I think it's only donations to the development team. Summing up the donors across Liberapay, Open Collective and Patreon gives close to the number in the title.
The Lemmy project - yes. You want to check if your home instance is sustainably funded too. I think lemmy.world for example is well funded. So is lemmy.ca - my home instance.
I know for a fact that DB Zer0 could use some love, and their admin has created a lot of extra tools that have helped the Fediverse manage abusive instances. If your instance is well funded, but you would still like to donate somewhere to show your support, I highly suggest you check them out.