Zerotier is a self-hostable product that allows users to create either self-hosted or Zerotier-hosted private networks.
Zerotier supports a vide variety of devices and offers both L2 and L3 connectivity.
To translate: L3 or Layer 3 networking is routed networking, like WireGuard does. The main limitation on this is the lack of broadcast traffic on the VPN which is a limitation for a fair set of home apps.
Zerotier is therefor unique in their offering of L2 support, which does support said traffic.
@d-Rickyy-b has written a good writeup on zerotier and how it works, you can check it out at the link below.