What issue? None of this is new. Most employees take their phones and laptops home every night and use them on their home networks. If they want to access files/sites on the company network, they VPN. Hacking a good VPN tunnel would be extremely difficult. The beauty of VPNs is that you can limit where on your corporate network that each user is allowed to go. If you wanted to each user could have different permissions.

Despite it’s name, the coronavirus doesn’t affect computer networks.