Liverpool will not face any major problems in qualifying for the final. Liverpool are in very good form right now. The team is able to dominate and win every match of the Europe League. At the same time, the Liverpool team is at the top of the Premier League table. This is Klopp's last season with Liverpool. He will certainly want to win both the Europa League and Premier League titles.
Leverkusen and Liverpool are the most eligible teams for this season's Europa League title. Both these teams are in very good form this season. Good performance has been maintained by both the teams. Both these teams will probably meet in the final.
Both teams have been favorites of many members here to reach the final round, for Liverpool obviously 100% I agree with you, because their journey to become title contenders so far we can not doubt anymore, Klopp's ability to set strategies and also a qualified squad is certainly the basis of how Liverpool can be strong enough in every competition that the their has participated in so far, The experience and mentality possessed by Liverpool is one of the main factors for Liverpool to become one of the teams that will easily reach the final.
As for Leverkusen, obviously I don't agree with you, because I think their performance in the league cannot be a reference for us to favorite them to reach the final, I admit that they are strong candidates at the moment, but so far I see no strong team that Leverkusen is facing to reach the Europa League final, And of course it makes it easier for them like now, Leverkusen is very difficult when facing Qarabag who is a weak team and that makes me pessimistic if Leverkusen can beat Milan in the semi-finals if they both meet later, I personally am quite sure if Liverpool and Milan will reach the final round of the Europa League this season with a note if they avoid in the semi-finals.