It is not an easy thing to be able to compete in the Champions League, because in the Champions League the big teams compete, for Leverkusen of course they will compete with other big teams and maybe this will make it difficult for them, it is very unlikely that Leverkusen can immediately dominate the League Champions.
Xabi Alonso has led Leverkusen to become a team that is difficult to beat, whether in the domestic league or in the UEL, even though in the end they were defeated by Atalanta in the UEL final yesterday, of course that doesn't make them low, I think Atalanta and Leverkusen deserve to move up to a more difficult level again, namely playing in the UCL next season, even though their strength may not be completely ready to face this challenge, they will try their best to be able to compete in the UCL next season.
Some of the teams that qualify for the UEL next season, it seems that As Roma and Manchester United could be quite strong teams there, although there are many other strong teams that have the potential to qualify for the UEL final next season, but I believe that As Roma also seems to be successful next season. If De Rossi has the financial support to be able to get more players in their main squad, the tight competition will also make the match at UEL even better. Apart from that, Manchester United, who are retaining Ten Hag, should also be able to show their abilities at UEL later.