The 20-year-old is current on loan with 2.Bundesliga side Hamburger SV, however the midfielder has struggled for game time in Germany, featuring for just 71 minutes in six league matches this season.
According to Football League World, Barnsley, Blackpool and Swansea City have all been in contact with the Citizens over Doyle's availability, while clubs in France, Spain and the Netherlands are also monitoring his situation.
The reports adds that Doyle is determined to become a first-team regular with Hamburger, however City are concerned about his current game time and will consider loan offers from other clubs in January.
Doyle was a standout performer for City's academy squad last season, scoring four goals and providing 10 assists in 18 Premier League 2 appearances.
The youngster has featured seven times in the senior side under Pep Guardiola and he has also made three international appearances for England Under-21s.