£25M?? That is insane.
He joined Celtic for £4.5M 3 seasons ago at age 26.
He performed well scored a lot but he gets shoulder injury problems and will be 30 by January. Transfermarkt valued him at 14M euros.
Spurs tried to sign him in 2023 and the price they talked about was around £16m. Spurs still felt it was a bit more than ideal. No way we are going to pay significantly more when he gets more injury and grows older.
For a reference Danny Ings joined West Ham at 30 years old for £12M + 3M add ons. Home grow. Liverpool on the resume. Plenty PL experiences. Although it did not work well at West Ham it is the market value of a back up striker around 30.