From the article:
A FIFA internal report had already concluded that the United Arab Emirates, Bahrain and Saudi Arabia could not join as co-hosts unless they restore the economic and travel ties with Qatar that were severed two years ago.
The regional diplomatic crisis left neutral Kuwait and Oman as the viable options. Oman has said it isn't keen on hosting games at the FIFA showpiece. Infantino visited Kuwait last month in an attempt to persuade them to host matches in 2022.
But FIFA has now concluded that it lacked the time to prepare a country to host the extra games.