Hello Josie,
Yes, the refrigerator and freezer temperatures can be adjusted manually using the control panel. For details, please refer to pages 32-33 of the fridge's manual:
https://downloadcenter.samsung.com/content/UM/202301/20230128185253856/SBS_RS5300C_DA68-04562A-00_EN_MES_CFR_29112022.pdf
Have a great day.
-John