This is the first domain in the .CH TLD protected with Ed448 (Algorithm 16) DNSSEC signatures, generated by a PowerDNS Authoritative Server compiled against OpenSSL 1.1.1
Test if your resolver validates Ed448 signatures using the rootcanary algorithm test
DNSviz result for ed448.ch
Verisign Labs DNSSEC debugger result for ed448.ch

The first Ed25519 (Algorithm 15) signed .ch domain is ed25519.ch