The dates are not shown in the system locale as suggested. They’re shown in the language setting of Logseq, which English, presumably US English since the date comes out as July 26, 2025. My OS language is Irish so I was expecting 26 Iúil 2025 and my location is Australia, so 26 July 2025 would be good too.

If it can only show dates according to Logseq’s localisation then you should change the text on the Code tab that suggests otherwise.

Manjaro Linux, Cinnamon Desktop, Logseq 0.10.12
Preferred date format in Logseq is set to do MMM yyyy