FilzaEscaped13 is here for A12 & A13 only for now, but all other devices including RootFS remount will be available soon as well. you can now use the latest jailbreak exploit on this version FilzaEscaped to iOS13. uses KPPLess to allow users to modify files outside of /var directory (remounts filesystem as r/w?). It also uses kernel exploit to get r/w access to the filesystem.
With Cydia Impactor no longer working for most people, sideloading IPA apps has become difficult. Now though, there is an alternative, and its called AltDeploy. It is a MacOS app though, so Windows users won’t be able to use it just yet.