Yes, it is generally normal for a new refrigerator to have a colder freezer compartment compared to the refrigerator compartment. This is because the freezer is designed to reach and maintain lower temperatures, typically below freezing, in order to keep frozen foods solid and prevent them from thawing.
On the other hand, the refrigerator compartment is kept at a higher temperature range, typically between 35°F (1.7°C) and 46°F (7.8°C), to preserve perishable foods while keeping them cool but not frozen.
If the temperature difference between the freezer and the refrigerator is within the normal range and both compartments are functioning properly, there is typically no cause for concern. However, if you notice significant temperature variations or other issues, such as excessive frost buildup in the freezer or inconsistent cooling in the refrigerator, it may be worth contacting the manufacturer or a professional technician to have the appliance checked.