Arteta is a talented coach and he is a first coach can help Arsenal go far like the past season after many years. Is his talent enough to help Arsenal win Champions League, it's big question but there is time for Arteta and Arsenal to improve. He is still a very young coach and can improve a lot and win titles with Arsenal or other clubs in future. If Tuchel can win Champions League with Chelsea, it's unfair to say Arteta can not win it with Arsenal or other clubs in his coach career. They are both talented coaches recent years.
Since leaving by Arsene Wenger, Arsenal get difficult break out to the top performance and keep consistent every season not only in UEFA Champion League but also had downtrend performance in Premier League.
Have drastically difference of Arsenal performance since managed by Mikel Arteta exactly last two season Arsenal keep perform well by dominance in Premier League although finish as runner up position and have eliminated at quarter final in Champion League.
Season 2024/25 become his second appearances in Champion League with Arsenal I think he has potential reach higher round until semifinal or possibility reach the final round, but Arsenal must be consistent with their performance exactly on crucial phase at quarter final or semifinal round after difficult when facing the experienced team such as Bayern Munich. Perform well in domestic league not guarantee for Arsenal will easily reach higher in Champion League because every team have motivate for winning the UCL trophy.