The 20-year-old joined the Foxes on loan from Sporting Lisbon last year and has gone on to enjoy an impressive campaign with the English club.
Issahaku was one of Leicester’s key players as they secured promotion back to the Premier League after winning the Championship.
The Ghana international has been involved in 20 goals this season, having contributed seven goals and 13 assists this season.
For his impressive displays, Issahaku has been named in SofaScore’s Team of the Season for the 2023/24 Championship campaign.
The former Steadfast FC star occupies the right side of a front three that is made up of Leeds United duo Crysencio Summerville and Georginio Rutter.
Viktor Johansson is in goal for the team of the season and flanked by the defensive quartet of Kyle Walker-Peters, Wesley Hoedt, Jacob Greaves and Leif Davis.
The midfield is also made up of Kiernan Dewsbury-Hall, Blackburn Rovers’ Sammie Szmodics and Norwich City’s Gabriel Sara.
Meanwhile, Leicester have reportedly triggered the €17 million buy option clause to sign Issahaku permanently.
This was all but confirmed by Sporting Lisbon manager Ruben Amorim, who stated: “We will make money. Talented players who don't adapt here will move to other clubs and give us added value, it's our system.”
Reports suggest Issahaku’s first club Steadfast FC, which is co-owned by Ghanaian politician Haruna Iddirsu, will also earn €7.9 million from the transfer fee.
The Ghanaian Division One League club sold the winger to Sporting Lisbon in 2022 for a $1.5 million fee, but they are said to have inserted a 50% sell-on clause in his contract.