The main problem for Italy is its public debt [1][2]. The debt is so big that Italy can barely pay interests to stay within the boundaries defined by EU. This means there is no remaining money to fund growth.
[1] In Italian: https://it.wikipedia.org/wiki/Storia_del_debito_pubblico_ita... [2] https://www.economist.com/special-report/2022/12/05/why-is-i...