Much of the Fediverse is developed by people who are pretty left-of-center, as it is based in Free, Open-Source Software, which is itself based upon left-of-center philosophy. As another commentor mentioned, you’ll probably find some instances that are politically aligned with you but have been de-federated from much of the rest of the Fediverse for hate speech and encouraging terrorism.
However, as I mentioned exclusion is pretty directly in conflict with FOSS philosophies so, they are going to be small echo chambers and you might have but luck with proprietary platforms run by free speech absolutists.