If it looks like this: \# 76 000100000100150568332D32390568332D32380568332D3237026832 0004000868121A2E68121B2E00060020260647000000000000000000 68121A2E26064700000000000000000068121B2E
That's the RFC3597 encoded form, probably because it's an unknown RR type. Taking a quick stab at decoding some of it according to "draft-ietf-dnsop-svcb-https-01":
\# 76 length; 0001 priority; 00 full registered name, null, "."; 0001 alpn key type; 0015 alpn value length; 05 alpn-id length; 68332D3239 alpn-id: h3-29; 05 alpn-id length; 68332D3238 alpn-id: h3-28; 05 alpn-id length; 68332D3237 alpn-id: h3-27; 02 alpn-id length; 6832 alpn-id: h2;