Shift+ Enter is probably your best bet here. Outside of that you could right click and use the context menu to select the parent element that way. Also possible but definitely longer would be to use command+/ to open the quick actions menu where you can type and run “select parent”
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Not at the moment but you can vote on the feature request here: Add shortcut for focus X-position field in Design panel (Like cmd + tab in Sketch)
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Also not available directly within Figma but there are a few plugins out there that may be able to help with this.
Hope this helps. 