Hello russellmoran99,
Network shares won't be visible by browsing around in Windows Explorer, you will have to use the IP like \\192.168.70.44 in the Windows Explorer address bar or whatever the address of the machine is where the share is. If you want to reach by DNS name you can set up a DNS server or use one you might already have in your network and then that can resolve \\pcname to whatever IP it is your PC with the share has.
I don't know why behavior would be different between 2 devices, that does not seem logical. I would suggest checking the client side log to be sure that the routes are being pushed, and to try to use ping and tcpdump to diagnose problems. You may reference this guide:
https://openvpn.net/vpn-server-resources/troubleshooting-reaching-systems-over-the-vpn-tunnel/
Kind regards,
Johan