Tuchel only wins one big title in Europe, Champions League. The rest titles he has are from France, with PSG and like Ligue 1 titles. He has yet won any Premier League, did not win Bundesliga with Dortmund. You are right that Tuchel has yet achieved big things like Pep Guardiola and even coaches like Jose Mourinho, Ancelloti have yet won trebles like Pep in the last season.
Thomas Tuchel career with Chelsea helped after success winning Champion League tittle on the first season become Chelsea manager, later failed winning Primer League tittles, EFL Cup or FA Cup. Since his career with PSG, I don't think any special thing from Tuchel because he won Ligue 1 tittle with PSG but never winning Champion League except success lead to final stage before beating by Bayern Munich in final.
Too far comparison between Thomas Tuchel with Pep Guardiola or Jose Mourinho, they have won Primer League, La Liga and Champion League tittles with difference team than Ttuchel not winning competitive tittle like Primer League.
Last season, although success won Bundesliga tittles I don't see any special performance with Bayern Munich because they fewest difference points with Dortmund, difference last several season when Bayern easy for winning domestic league.