I agree with you that the series ended perfectly.
However, it's Apple who needs (wants) the money as this is an Apple TV+ series and it's
Apple who greenlit season 4.
Apple TV+ has greenlighted a fourth season of Ted Lasso, with Jason Sudeikis set to return, coaching a women's team. It will film in Kansas & UK.
deadline.com
You better believe it: Ted Lasso is officially back as Apple TV+ has greenlighted a fourth season of its flagship comedy series, with Jason Sudeikis set to return as star and executive producer.
According to sources, Juno Temple, who played Keeley in the first three seasons, is in negotiations to rejoin fellow original cast members Sudeikis (Coach Lasso) as well as Hannah Waddingham (Rebecca), Brett Goldstein (Roy) and Jeremy Swift (Leslie) who were locked in for the new installment back in August.
And, picking up where Season 3 left off, I hear the Season 4 premiere episode will film in Kansas (likely Kansas City) before Ted Lasso heads back to the UK. Casting of new roles is expected to begin shortly, with production eying a July start, sources said.
Apple is adamant about making Apple TV+ succeed by trying to grow subscribers and revenue.
They do this by pumping out the familiar content. That's the easiest thing to do as trying to come up with something fresh and new is risky and expensive.