Bologna don't have experience to compete for top four position and potentially they will have problems to maintain their good performance in future. It will give chances to Napoli and some other clubs like Roma, Atalanta. Napoli can not control how Bologna play but they can control their performances. It is what they must focus on first and wait for green light from Bologna, Roma and Atalanta.
Don't underestimate underdog teams like Bologna, however, football can still give surprises, even teams with no experience can still compete there if their performance is impressive and that's what Bologna is doing now, they are performing impressively and consistently so they managed to occupy fourth place even though they still have a long way to go. long and AS Roma and Atalanta still have a chance to take that position but Bologna also still has a chance to maintain their strength and for Napoli I don't know whether next season they can compete again in the UCL because their performance is not so stable.
Although Bologna is a small team, Bologna has an extremely successful season with 4th place on the Serie A rankings. Bologna showed their bravery in a decisive match to the top 4 race against Atalanta, They had an impressive comeback to help them take 4th place. The upcoming challenge for Bologna is extremely difficult when they face the strongest team this season, Inter. The gap with the chasing group is 4 points. Roma and Napoli are two clubs that will likely surpass Bologna to take 4th place. Because both have just replaced the coach, those coaches are bringing a new source of wind to the club, which is gradually stabilizing. Don't forget last season, Napoli was the defending champions. Although this year they cannot keep the Scudetto. But Napoli will have to make a lot of effort to reach the top 4.
In my opinion, Bologna is not a small club, they have a pretty good history in Serie A, they are recorded as having won 7 titles in Serie A, so don't underestimate them as a small team, even though their performance in the last few seasons has not been that impressive, this season it seems like they are starting to did their best and have returned to their best performance to compete for UCL tickets, Bologna proved to be putting a lot of pressure on Atalanta even though they played away from home and were able to win, bringing them to their current position, and to face Inter Milan it was quite difficult for Bologna but at least they can still maximize their draw if they are not able to beat Inter considering Inter's very strong performance, hopefully the home factor can make Bologna play a little surprising because the teams below really hope that Bologna will lose and slip from their position so that there is still a gap to overtake them.