My client insists that he needs a SVG font, is there any way to export it from Glyphs? Or any recommendation
You mean the old svg-svg font? Not svg in OpenType? There is really no use for them. At least not since 10 years ago.
SVG in Opentype, for this I can use the tutorial “Svg Color”? With sbix maybe
Does this help: Creating an SVG color font | Glyphs ?