So far Italian teams have dominated several European competitions and as you said it is still a possibility for Juventus and Roma to meet in the European league finals. But what is certain is that their opponents this time are not easy opponents to beat, both Sevilla and Leverkusen recorded consistent wins in the previous round and managed to advance to this semifinal. Even so, I think Juventus' chances of qualifying are greater than Roma. The match is still going on long enough and the results can still change depending on whether the team can continue to be consistent or not in the domestic league because that is also a definite consideration towards this semifinal.
Yes, Serie A clubs can dominate competitions in Europe, their representatives managed to be the most in 2 prestigious competitions, the Champions League and the European League, at least until this semifinal. AS Roma and Juventus are good clubs, they have the chance to meet in the final. But I agree Sevilla and Leverkusen are not clubs they will beat easily. They managed to show their best in the European League even though in the domestic league they are still very difficult to compete in the top flight.
Maybe I will add 1 more team from Italy, namely Fiorentina, who managed to penetrate the semifinals of the conference league this season, so a total of 5 teams from Italy have qualified for the semifinals of European competitions. Back to the European leagues, Roma and Juventus are more mentally strong for this competition and I'm pretty sure that both of them can beat their opponents who are currently also in their best form. No one expected a comeback from Sevilla after getting rid of the European league champion candidate this season, Manchester United, while Leverkusen managed to get rid of Gilloise, who had previously also eliminated a team from German Union Berlin. So this is an equal match and with the enthusiasm of each team I hope these two matches can later become an arena for exchanging goals to reach the European league final.