The Brazilian was left out of Tottenham's 25-man Premier League squad earlier this month and did not feature in the north London club's Carabao Cup defeat by Liverpool.
As a result, he will be unable to earn any Premier League minutes until after the January window at the earliest, and only then if he is restored to the club's officially submitted squad list.
Everton's interest over the summer was accompanied by reported interest from the Saudi Pro League and clubs in Brazil, though no agreement was reached with any of them, leaving Richarlison's situation unresolved heading into the new season.
According to a new report from ESPN Brazil, United Arab Emirates side Shabab Al Ahli, managed by his fellow countryman André Jardine, submitted an offer to Tottenham in an attempt to sign him.
Spurs turned down the approach, the report added, though the precise fee proposed by the Emirati club was not disclosed. The UAE's transfer window remains open until 28 September, leaving time for a fresh bid should Shabab Al Ahli wish to return with an improved offer.
Tottenham, for their part, are reported to intend keeping Richarlison at the club until the turn of the year before considering potential exit routes in January, when a broader range of suitors may re-emerge for a player who has fallen down the pecking order under Roberto De Zerbi.
Richarlison joined Tottenham from Everton in 2022 and has had a mixed spell in north London, with injuries and inconsistent form limiting his impact despite flashes of quality, including a memorable brace in the Champions League.
His omission from Tottenham's squad list this season marks a significant downgrade in his standing at the club, and with his path back into De Zerbi's plans looking increasingly narrow, a January exit in some form appears increasingly likely, whether that ultimately comes via a return to Merseyside, a move to Saudi Arabia, the Gulf, or elsewhere.