Is the QSFP28 real 100Gbps or something like LACP that you can only reach 25Gbps for a single connection?

Asked this question because I always see something like “the 100G QSFP28 DAC internally contains 4 cables which runs 25Gbps for each”, start thinking are those 4 cables can collaborate and sync at physical link level so they can reach 100Gbps, or they just work individually so a single thread connection can only reach 25Gbps?