Oddly in that same time came warnings against. As an example here is a URL -- https://www.theguardian.com/world/2020/nov/20/remdesivir-dont-use-drug-trump-took-for-covid-19-who-says
And another for that time: https://www.yahoo.com/lifestyle/remdesivir-hailed-and-taken-by-trump-doesnt-work-for-coronavirus-world-health-organization-declares-192616230.html
Apparently remdesivir was used in conjunction with many others, and then came the political jockeying.
Being that treatment of Covid was new and this was the President who had contracted the virus I imagine all treatments that had a chance of success were considered and/or tried. He was flown to Walter Reed for treatment (maybe out of an abundance of caution) where he would have received the best care possible. The President may have been sicker than what was shared at the time.