Le Pen used to favor exiting the euro zone en eventually the European Union. In the last few years her movement is however shifting towards the center, mitigating some of its more extreme positions:
Zemmour’s policy proposals have had the unintended effect of making Le Pen appear moderate. Since losing by a 2-1 margin to Macron in the last presidential runoff in 2017, she has turned down the volume on her National Rally (former National Front) party’s most extreme positions. In trying to broaden her base she no longer talks about abandoning the euro or withdrawing from the European Union.
(emphasis is mine)
Her message is now more mainstream and more pointedly anti-Macron:
Eager to steer attention away from her Russian baggage, Le Pen has focused her campaign on economic issues. It turned out to be the right move. Polls now show that purchasing power is the No. 1 concern of French voters as inflation looms and gas prices soar amid Putin’s war. She offered a sharp contrast to Macron’s sweeping technocratic vision of France and its unpopular measures like pension reform and an older retirement age. Instead, she has called for tax cuts and contrasted the economic situation of elites in cities to the struggling working classes in rural areas, where her support is strong.
In other words, while the Ressemblement National (Le Pen's movement) has not abandoned its anti-euro and anti-EU positions, this is no more their primary agenda. While Macron's statement is technically correct, it is unlikely that Le Pen would seriously pursue these goals.
The recent news confirm that right now the main target of Marine Le Pen is not the European Union, but the United States and NATO:
La candidate RN à l'élection présidentielle entend sortir du commandement intégré de l'Otan, remettre à plat les relations avec les Etats-Unis, stopper les coopérations militaires et industrielles avec l'Allemagne et se rapprocher de la Russie.
The presidential candidate from the RN intends to quit the NATO joint command, reconsider the relations with the United States, stop military and industrial cooperation with Germany, and create closer ties with Russia.
(translation is mine)
It is necessary to point out that the remarks regarding forging closer ties with Russia are dating to her program before the current events in Ukraine. The attacks against the United states have largely to do with the US systematically undermining the French arms sales, notably the Mistral Affair (which nearly led to bankruptcy and foreign takeover of the strategic Saint Nazaire shipyard) and AUKUS deal (characterized as backstubbing by the French interior minister). Grievances against Germany include recent decision by the latter to purchase American F-35 rather than French Rafales, as well as the historical grievances.
The article also notes that Marine Le Pen would like to progressively substitute the European Union by the European Alliance of Nations, the members of which would presumably have higher degree of sovereignty.