Not quite yet. But also like another user said, DuckDNS

"Note: Starting January 1st, 2020, GCP will charge for VM instance external IP addresses. However, under the Free Tier, in-use external IP addresses will be free until you have used a number of hours equal to the total hours in the current month. Free Tier for in-use external IP addresses apply to all instance types (not just f1.micro instances)."

A VPN server doesn't strictly need a static IP, you can use dynamic DNS.

Can you explain, or provide a link?

I’m a networking novice, but in my .ovpn profiles I provide, the IP is hard-coded.

Instead of an IP, you can use a domain. Then you can use Dynamic DNS to keep that domain pointed at your current IP (essentially, you run a small program on the same computer as the VPN server, that updates the DNS provider every time the IP changes).