I moved to Windows recently, but still, I need Ubuntu installed in WSL for some of my work. You can enable Ctrl + Shift + C / Ctrl + Shift + V shortcuts for copy/paste. Right-click on the title bar and select Properties from the context menu. In the Options tab, tick the Use Ctrl+Shift+C/V as Copy/Paste option. Click OK. Now, we are good to copy/paste similar to the Ubuntu native shortcuts.
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