𝔐𝔦𝔰𝔰 ℭ𝔬𝔯𝔯𝔲𝔭𝔱𝔦𝔬𝔫

While I haven’t personally messed with these features in particular, Stable Diffusion Web-UI (specifically automatic1111’s fork) should be able to do most of what you stated with in- and outpainting. It’s self-hosted however