It's literally led by a billionaire businessman that markets with make czechia great again hats.

The party's ideological character is contested by political scientists, though it is widely considered to be populist in nature. After being formed predominantly as an anti-corruption vehicle, the party has at different times been considered centrist, liberal, conservative, right-wing, social democratic[17] or centre-left[18] by different commentators, leading to a further characterisation as a syncretic or catch-all party. Since the 2024 European Parliament election, the party has positioned itself to the right, co-founding Patriots for Europe, a group in the European Parliament that is made up of Eurosceptic parties that primarily adhere to national conservatism and right-wing populism.

From wikipedia.

The czech wikipedia mentions donations from big companies and vague promises. They are for cutting taxes which is a common right wing populist thing. They also do seem to be in favor of investing in infrastructure and such, at least in 2017, but my understanding is they have moved more to the right.

He's also pro trump which makes him automatically right wing in my eyes.

While in the past the movement has publicly presented as liberal, during recent years[23] it has intensified the national-conservative direction, which also consists in the fact that some of the more liberal members of the movement have gradually abandoned, or also in the fact that the ANO movement has become a member of a European faction composed mainly of conservative parties.[ 24][25][26][27] While in the past the movement supported the adoption of the euro, correspondence, same-sex marriage, ratification of the Istanbul Convention or the Green Deal for Europe, recent years have been rather negative about the topics mentioned.[29][30][31][32] The former European Commissioner Věra Jourová,[33] the Emeritus Mayor of Brno Petr Vokřál[34] and the Emeritus Moravian-Silesian Governor Ivo Vondrák represented the Liberal Wing.[33] 35] Among the more liberal members of the movement are MP Robert Králíček, the Minister of Justice Emeritus Helena Válková, the MP Jana Pastuchová and the mayor of Zlín Jiří Korec,[36] rather conservative positions are held by the MP Aleš Juchelka,[37] MEP Milan Brázdil, the Minister Emeritus of Finance Alena Schillerová[38] and the MP Patrik Nacher. 39]

From the czech wikipedia.

It’s only populist party.

If it is "only a populist party" (there is no such thing, since populism is a political strategy, not an ideology), why did you start out by claiming it was a leftist populist party?