Britain's Peaty, an eight-time world champion, would have been preparing for the Olympic Games in Tokyo had COVID-19 not forced a postponement.
FINA said it will now consult with the organisers of the 2021 World Championships in the Japanese city of Fukuoka "to examine a revision to the proposed dates".
For Ikee Rikako, that will probably be Paris 2024, maybe be even Los Angeles 2028.
Lochte won the first of his six Olympic gold medals as a relay swimmer in Athens.
The swimming worlds are set to be held in Fukuoka in Japan between July 16 and August 1 next year.
The federation called for the International Olympic Committee to "study the possibility of a postponement".
Katie Ledecky continued her dominant week, clocking 1:54.59 to demolish the field in the women's 200m freestyle.
The Court of Arbitration for Sport (CAS) hit the Chinese freestyler with the lengthy ban on Friday for refusing to give a doping sample in September 2018.
The Swiss-based CAS upheld the appeal by the World Anti-Doping Agency (WADA) against the international swimming federation.
Cunha secured silver medal after she was shown slightly ahead of Sharon – who took bronze – on camera.
France will send the biggest contingent including 16 swimmers to the Qatari capital, while Italy’s squad will consist of 14 athletes.
Schoeman has been suspended until May 17. The swimming competition in Tokyo starts on July 25.
QSA, with the hosting of the major swimming events, is preparing to deliver the successful 2023 FINA World Aquatics Championships.
The 30-year-old 'Iron Lady' reached her landmark figures with victory in the 400m medley, 15 years after her first podium in the championships in Vienna in 2004.
Sun, winner of 11 world titles, was cleared of wrongdoing in January by FINA, the international swimming federation.