• Illustrator: Outline Stroke =>
  Affinity: Layer => Expand Stroke
• Illustrator: Fit artboard to selection =>
  Affinity: Artboard tool (below arrow tool, 2nd from top), choose Size: Selection in menu above, click insert dartboard next to menu: artboard may be right size but content not aligned. Use alignment tool to align to artboard (left, top)

What does it do for soft line breaks? Like that