During an April 2020 media briefing, Trump did ask members of the government’s coronavirus task force to look into whether disinfectants could be injected inside people to treat COVID-19. But when a reporter asked in a follow-up question whether cleaning products like bleach and isopropyl alcohol would be injected into a person, the then-president said those products would be used for sterilizing an area, not for injections.
https://www.factcheck.org/2020/10/timeline-of-trumps-covid-19-comments/
Also snopes on the bleach thing: