Hi Mellachi,
Welcome to Affinity Forums
Affinity Photo for iPad (and also desktop) wasn't designed as a DAM / RAW Developer as Lightroom or Aperture. It doesn't manage libraries, don't save RAW settings to a XMP sidecar files (or to a database) nor apply the same settings from one image (RAW) to a group of images from the same set. It's more comparable to Photoshop + Adobe Camera RAW where you start with a RAW image in Adobe Camera RAW for global adjustments (shadow highlights recovery etc), move to Photoshop for further editing using the usual photo editing tools (channels, selections etc) and export the end result. You can work around some of these limitations using batch jobs/macros (in the desktop version) but the workflow is different from a true DAM software. We do intend to develop a DAM software later.
Regarding your question: no, it's not possible to save develop presets in the iPad as we can in the desktop version.
