Egan is expected to start Saturday’s Euro 2020 qualifier in Georgia after Richard Keogh was ruled out for the long-term after a car crash, while Mick McCarthy’s men then face Switzerland in a week’s time.
The defender has established himself at Premier League level with Chris Wilder’s Blades, and recently pulled on the captain’s armband for the friendly win over Bulgaria.
And Egan said: “On the last couple of trips I didn’t play, but I prepared as if I was going to, just in case.
Sheffield Wednesday boss and chairman unhappy after attackers leave for Premier League
Darren Moore dismisses Barry Bannan over-reliance notion after surprise Sheffield Wednesday sub call
Why Sheffield Wednesday left Dennis Adeniran out completely against Charlton Athletic
Chris Wilder says Sheffield United "ready to rock and roll" after Middlesbrough draw
Middlesbrough 2 Sheffield United 2: Managers' reaction as Blades settle for point at Riverside
“If you are selected you have to be ready to do a job. You have to prepare all week as if you’re going to play.
“I am playing with confidence at the moment and I’ve always had belief in my ability, no matter what level I played at. You need that as a player, if you start doubting yourself things can become quite tricky.
“I’m really enjoying my football at the moment, and hope to keep enjoying it and keep improving.”