systemd-resolved only supports plain DNS and DoT, not DoH. The leading dash means that DoT is disabled on that link.
If you actually need DoH, enable it in the browser settings. Or configure it globally with a service like dnscrypt-proxy.
See also: How do I use a DNS-over-HTTPS as the default DNS server system-wide (not on per-connection basis)? - #5 by vgaetera