I'm pretty ignorant about eastern European politics, it would be interesting to hear a view on this from someone with good knowledge of those states.
Italy is probably the closest comparison. But Berlusconi and Salvini had already done lots of legislative damage and injected cultural poison before Meloni came to power. Gianfranco Fini, who oversaw the kind of rebranding of Alleanza Nazionale that Le Pen is pulling off with RN, was a minister in Berlusconi's second government in 2004.
France is also different in other ways: the level of social tension is much higher, the racialisation of poverty has a very clear geography, and the level of conflict between people in these areas and the police/CRS is already very high.
Le Pen/Bardella will be impeded by Macron on many fronts, and likely roll back some of their proposals like a prohbition on dual nationality for certain jobs, for example. But more red meat will be thrown to catholic fundamentalists, and most likely it'll be LGBT+, feminists etc who will take the brunt. And arabs, of course, we'll be hearing all about arabs, all the time, and islamism etc. Far-right thuggery, in and out of uniform, will feel itself granted a carte blanche. And Macron's regime has already been charcterised by a significant increase in police violence.