The one thing that's really going to be fucked for a while is Tailscale/Headscale VPNs, because they deliberately adopted a "no protocol agility" mentality in the core, meaning they're a long ways away from PQ mitigation for bulk traffic. If this is a concern, netbird.io is a slick alternative.
WireGuard®-based overlay network and Zero Trust Network Access in one platform for reliable and secure connectivity