Currently, search compatible relays (NIP-50) were quite limited. We can probably count them by fingers with notable relays such as relay.nostr.band , relay.noswhere.com , and search.nos.today .
Shoutout and big thanks to nostr:npub1xdtducdnjerex88gkg2qk2atsdlqsyxqaag4h05jmcpyspqt30wscmntxy nostr:npub12262qa4uhw7u8gdwlgmntqtv7aye8vdcmvszkqwgs0zchel6mz7s6cgrkj and nostr:npub1q7qyk7rvdga5qzmmyrvmlj29qd0n45snmfuhkrzsj4rk0sm4c4psvqwt9c who built them.
Hopefully more relays with good search performance will come to support #Nostr 🙂