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It might be possible. See also:
HiddenVM Project - best solution available?
However, this is unsupported by Whonix developers. This is a declined feature request. For what this means, please see:
Should you decide to proceed with this despite this being unsupported by Whonix developers, for any support requests, please contact upstream (the original developers of any Whonix / Tails combination projects) communities / support directly.