MIDI data across networks?

This is a bit of an inter-disciplinary question, and it is networking with places beyond home:

I have a Mac in the US, and another Mac in another country, used by a relative. Both are connected to the internet. I want to be able to see the Mac in the other country as if it were on my local network. Is this possible?

I want to be able to send MIDI messages from one Mac to the other for use by Logic Pro (a digital audio workstation—probably not particularly relevant, but I figured it's better to be clear).

Using Apple's Audio MIDI Setup, this is already possible—and very nicely streamlined!—but it only works for computers on the same network. Latency will, naturally, be higher if messages are sent across networks, but this isn't a concern for my application.

I've tried setting up a VLAN, which—from my understanding—would be ideal, but it looks like my Mac does not have any network devices that allow for VLAN: the dropdown menu for "Interface" is empty. Others across the internet seem to have run into this on their Macs, too... Still, in theory from what I've learned about VLANs, one would work.

Any help or general ideas would be great. Thanks so much!