Blobs and lines on outside of a cylinder; MINIi+, PETG
looks like the seam (blob while jump to the next layer). To be sure in prusaslicer change the seam from Nearest to Rear or Aligned, if all blob are aligned then it is a seam.
other than this https://help.prusa3d.com/en/article/seam-position_151069 try adjusting it by "retraction on layer change" in printer settings or in filament overrides.
But don't hold your breath. On round objects where you can't hide the Z seam you're always going to have artifacts where the nozzle has to move up to start the next layer. Unless you can print the object in vase mode.