Add the ability to Trace bitmap images to a vector as in Illustrator (Image Trace).
For Affinity Designer iPad / Affinity Designer Desktop
For the iPad or in general?
However it's often asked after, but I don't know if it has been officially acknowledged and commited to be really build one day. So actually one has to use other third party tracing tools in order to build vectors out of bitmap drawings. Some third party tools do also offer color tracing, though integrated tracing features as shown above in your Ai examples, would be nice to have. - In the meantime I for my part, use some own workarounds to overcome these limitations, by tracing and then routing things over to Designer ...