I know little about this phone, other than having just ordered a U.S. version. But the listing for this case on Amazon states that there are 3 versions:

SE Asia: 164.2 x 75.9 x 9.1 mm

US: 165.8 x 75.9 x 9.1 mm (and has larger cameras)

EU: 166.5 x 75.9 x 9.2 mm

https://www.amazon.com/Protector-MAIKEZI-Shock-Absorption-Flexible-Protective/dp/B09KTMP3F5/

Those sizes show the European version as the largest, consistent with your experience.