This possibility will be fought by Roma in the second leg, but everyone knows that it is a super difficult mission. So far Leverkusen have been very difficult to beat, this has been a perfect season for them and everyone admits it.
Roma still have a chance to qualify, but I would say it is a hope that is difficult to come true. They will try their best and appear totally attacking from the first half, but if Leverkusen is able to score 1 goal then it is clear that Roma's chance of coming back is 99% gone. Leverkusen is the favorite to qualify for the Europa League final this season, the probability is very high.
It would be easier for Roma if they can score one goal at home but it was not what they done in the first match. Hence, they will have very big task that is nearly unachievable in the second match. Roma can beat Leverkusen but beating Leverkusen 2 - 0 or any result with 2 goal difference at Leverkusen's home stadium is not easy.
In addition, in this season, in many matches, Leverkusen shown that they are very strong mentally and are not easily to collapse after a conceded goal. Roma, in contrast, to beat Leverkusen with two goal difference, will have to create panic mentally in Leverkusen, that sounds impossible.
Talking about Xabi Alonso's contract, this coach is still under contract until 2026 but he has the option to move meaning he can use this option at any time, it turned out that this clause was recorded in the contract. As a consideration, if he moves then Liverpool will be the first option and 2 other teams Bayern Munich or Real Madrid are on the list, this will be interesting news in the upcoming transfer window.
I believe Xabi Alonso aims at a coach position of Real Madrid but that position will not open next summer. The current contract of Carlo Ancelotti and Real Madrid will not expire next summer and Xabi Alonso decided to stay with Leverkusen only because he wants to wait for Real Madrid's coach position to open in 2025 summer.
Xabi Alonso will need to prove himself again, next season, to strongly convince Real Madrid and take that job in 2025 summer transfer season. The next season will not be easy for Xabi Alonso and Leverkusen.