Manton from Micro.blog intends to enable the service as an ATProtocol PDS:

The long-term plan for Micro.blog is to fully support AT’s PDS β€” Personal Data Servers. Any blog hosted on Micro.blog would plug into Bluesky seamlessly, with data portable to other AT Protocol hosting providers.

Micro.blog already functions as an ActivityPub server, and currently supports cross-posting to Bluesky.