The German has enjoyed a successful period at Anfield, winning the Champions League and Premier League.
Germany and England will renew their rivalry in the round of 16 at Euro 2020 next Tuesday.
"Yeah, the gaffer at Liverpool has been very influential," Henderson said.
"The charisma he has got, a lot of people love him even if you're a neutral fan. He's had a big part [to play] in English football in the Premier League."
And Henderson added that the squad felt confident heading into the blockbuster clash at Wembley.
"We have quite a young squad," he admitted. "And that can be a positive thing. A lot of them go out and just enjoy the game, play with no fear, and that's what they need to do again on Tuesday.
"Go and enjoy it, go and show everyone how good you are, but use the passion and emotion in the right way to give you energy for the game, because that can be the difference.
"As an experienced player I can help with that, and make sure we are in the right frame of mind going into the game, making sure training is at the right level over the next few days.
"But everyone is confident, feeling good, and we have a few days to prepare for a huge game. A lot of the lads have already played in big games - Champions League finals, cup finals, big games for England - so they're used to those, even though they're young, and I'm sure they're looking forward to this one on Tuesday."