I do, but the svg source is not the same as the one I get from .ai, and it's not the same even in practice: if I open the file with a graphic editor (or the browser), the real SVG canvas has not the same dimensions as the artwork. Also, using artboards in Affinity Designer, seems to add useless layers to the final svg. This is not good for web.
It's a pity, everytime I try to use Affinity Designer, I'm forced to revert back to Illustrator or Photoshop. But I bought Affinity Designer, so I'd like not to have to. I also quite hate Adobe's fee subscription mechanics, but I'm forced to them until Affinity doesn't really address such obvious web requitements like compression preview or svg canvas dimensions.