Extending Wireless in the yard

I am trying to get a sliver of wireless out in my barn, which is out of range of the Orbi system.  I have used and have Netgear powerline adaptors and want to know if there is any way to add a wireless router in my barn, which is fed from the powerline adaptor from the Orbi network.  I also have a spare Aiport Express, but from what I have read, I cannot make this into a wireless extender.  Has anyone tried extending the network via powerline off the Orbi?  And if so, is it possible to get wireless to that remote area?  Thanks.