VPN + Mesh network/virtual LAN software recommendations

I currently use Mullvad VPN on all my devices but I’m interested in using a mesh VPN/virtual LAN software so I can connect to my self-hosted services privately (e.g. being able to connect to Nextcloud on a home server from my phone). Does anyone have any recommendations for this that work well in combination with regular VPNs?

Tailscale has an integration with Mullvad but they don’t accept cryptocurrency as payment, making it non-anonymous as a provider.

I don’t know how well any of other popular mesh VPNs like Headscale, Netbird, Tinc, Innernet, Nebula, Zerotier, OpenZiti, Yggdrasil, etc work with traditional VPNs also.