Are there any options 'under the hood' that allow adjusting how SVG files are exported, beyond those found in the simple window giving options for DPI and select page/object?

I'm having difficulty importing into another application (it's actually racing liveries in Gran Turismo - every man needs some down time lol, so do it in style!) and there's something about the coding of the SVG it doesn't like.

Other users on COrel for example report simply changing the Styling Options from Internal Stylesheet or CSS to "Presentation Attributes" fixes them.

I've tried SVGOMG but it's not doing the trick.

Applications such as Inkskape, Corel, Illustrator all work, but my SVG's from Xara don't.

So, are there any other tinkerables in Xara?

Cheers

Chris