DOCUMENTATION: ivfflat unavailable for sparse vectors with pgvector

[RonanKMcGovern]

Documents suggest

3.  (Optional) Create a vector index on the sparse vector column.

CREATE INDEX ON documents USING vectors (embedding svector\_dot\_ops); \-- for pgvecto.rs users
CREATE INDEX ON documents USING ivfflat (embedding sparsevec\_ip\_ops); \-- for pgvector users

but I don't believe there is ivfflat for sparse vectors with pgvector since:

SELECT am.amname, opc.opcname, opc.opcintype::regtype
FROM pg_am am 
JOIN pg_opclass opc ON opc.opcmethod = am.oid
WHERE opc.opcintype::regtype::text = 'sparsevec'
ORDER BY am.amname, opc.opcname;
 amname |       opcname        | opcintype 
--------+----------------------+-----------
 btree  | sparsevec_ops        | sparsevec
 hnsw   | sparsevec_cosine_ops | sparsevec
 hnsw   | sparsevec_ip_ops     | sparsevec
 hnsw   | sparsevec_l1_ops     | sparsevec
 hnsw   | sparsevec_l2_ops     | sparsevec

Is there a workaround OR does one have to add the pgvecto.rs extension? Thanks