I don't expect teams like Girona and Bologna to do well in the Champions League next season. However, there is no doubt that both these teams have played brilliantly in the last season. The Girona team competed for the La Liga title. And it was a completely unexpected event. The Girona team has struggled to avoid relegation in the past. But last season this team fought for the title.
However, we have seen erratic performances from Girona's players in the matches at the end of the season. Moreover, if you want to perform consistently well in the Champions League, you need a lot of experience. Girona and Bologna management may be able to build stronger squads if they spend money. But getting the squad players experienced will not be an easy task for Girona and Bologna.
Teams like Girona and Bologna are not teams that often play in the Champions League so their level of play will be very different, even though both of them played well in their respective leagues last season. As we know, the Champions League is very competitive and the competition here is quite big so it will be difficult for them to qualify for the next stage. Every season there will definitely be one team that is quite surprising but when entering the next season most of them lose their best form.
Without having experienced players it will be much harder to play in the Champions League and even we see how strong teams that often play in the league also have difficulty facing the tight competition. I don't think both of them will easily get through the group phase because there will be quite tight competition from the opponents they will face.
You are right. These teams are not performing regularly in the Champions League. There is no doubt that these two teams played very well in their respective leagues last season. So I think the chances of them playing well in the Champions League is low. The Champions League is very competitive. And if you want to do well here, you need experienced coaches and squads.
I personally think Girona and Bologna will not aim to do well in the Champions League. They will try to do well in their own league this season as well. But these two teams will likely compete for the Europa League title if they are relegated to the Europa League. Because the Europa League is slightly less competitive than the Champions League.